72672256 has 22 divisors (see below), whose sum is σ = 145275590. Its totient is φ = 36335616.

The previous prime is 72672251. The next prime is 72672311. The reversal of 72672256 is 65227627.

It can be written as a sum of positive squares in only one way, i.e., 46457856 + 26214400 = 6816^2 + 5120^2 .

It is not an unprimeable number, because it can be changed into a prime (72672251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34461 + ... + 36508.

Almost surely, 2^72672256 is an apocalyptic number.

It is an amenable number.

72672256 is a deficient number, since it is larger than the sum of its proper divisors (72603334).

72672256 is an equidigital number, since it uses as much as digits as its factorization.

72672256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70989 (or 70971 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The square root of 72672256 is about 8524.8024024021. The cubic root of 72672256 is about 417.3075231197.

The spelling of 72672256 in words is "seventy-two million, six hundred seventy-two thousand, two hundred fifty-six".