72656100 has 216 divisors, whose sum is σ = 255921120. Its totient is φ = 17088000.

The previous prime is 72656071. The next prime is 72656173. The reversal of 72656100 is 165627.

72656100 is a `hidden beast` number, since 7 + 2 + 656 + 1 + 0 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 405811 + ... + 405989.

It is an arithmetic number, because the mean of its divisors is an integer number (1184820).

Almost surely, 2^72656100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72656100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127960560).

72656100 is an abundant number, since it is smaller than the sum of its proper divisors (183265020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72656100 is a wasteful number, since it uses less digits than its factorization.

72656100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 72656100 is about 8523.8547617847. The cubic root of 72656100 is about 417.2765965075.

The spelling of 72656100 in words is "seventy-two million, six hundred fifty-six thousand, one hundred".