72647256 has 64 divisors (see below), whose sum is σ = 209796480. Its totient is φ = 20718080.

The previous prime is 72647249. The next prime is 72647257. The reversal of 72647256 is 65274627.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72647257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3606 + ... + 12581.

It is an arithmetic number, because the mean of its divisors is an integer number (3278070).

Almost surely, 2^72647256 is an apocalyptic number.

It is an amenable number.

72647256 is an abundant number, since it is smaller than the sum of its proper divisors (137149224).

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

72647256 is a wasteful number, since it uses less digits than its factorization.

72647256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16224 (or 16220 counting only the distinct ones).

The product of its digits is 141120, while the sum is 39.

The square root of 72647256 is about 8523.3359666272. The cubic root of 72647256 is about 417.2596649447.

The spelling of 72647256 in words is "seventy-two million, six hundred forty-seven thousand, two hundred fifty-six".