72497856 has 28 divisors (see below), whose sum is σ = 191817752. Its totient is φ = 24165888.

The previous prime is 72497851. The next prime is 72497857. The reversal of 72497856 is 65879427.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (72497851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188605 + ... + 188988.

It is an arithmetic number, because the mean of its divisors is an integer number (6850634).

Almost surely, 2^72497856 is an apocalyptic number.

It is an amenable number.

72497856 is an abundant number, since it is smaller than the sum of its proper divisors (119319896).

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

72497856 is a wasteful number, since it uses less digits than its factorization.

72497856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377608 (or 377598 counting only the distinct ones).

The product of its digits is 846720, while the sum is 48.

The square root of 72497856 is about 8514.5672820173. The cubic root of 72497856 is about 416.9734353854.

The spelling of 72497856 in words is "seventy-two million, four hundred ninety-seven thousand, eight hundred fifty-six".