Today 26th September is the 270th day of the year, the harmonic mean of the factors of 270 is an integer. The first three numbers with this property are 1, 6 and 28..... 270 is 5th one of the series.

Can you guess What is the next one? These are sometimes called Ore numbers for Oystein ore, who studied them or harmonic divisor numbers
270 is sum of eight consective primes, 270=19+23+29+31+37+41+43+47.
270 is sum of three cubes 270 = 3^3+3^3+6^3.
10! = 3628800 has 270 factors.
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Can you guess What is the next one? These are sometimes called Ore numbers for Oystein ore, who studied them or harmonic divisor numbers
270 is sum of eight consective primes, 270=19+23+29+31+37+41+43+47.
270 is sum of three cubes 270 = 3^3+3^3+6^3.
10! = 3628800 has 270 factors.
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