72604331 has 16 divisors (see below), whose sum is σ = 79470720. Its totient is φ = 66063360.

The previous prime is 72604327. The next prime is 72604351. The reversal of 72604331 is 13340627.

It is not a de Polignac number, because 72604331 - 2² = 72604327 is a prime.

It is a super-2 number, since 2×72604331² = 10542777759915122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72604331.

It is not an unprimeable number, because it can be changed into a prime (72604351) 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, 70601 + ... + 71621.

It is an arithmetic number, because the mean of its divisors is an integer number (4966920).

Almost surely, 2^72604331 is an apocalyptic number.

72604331 is a deficient number, since it is larger than the sum of its proper divisors (6866389).

72604331 is a wasteful number, since it uses less digits than its factorization.

72604331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 72604331 is about 8520.8175077278. The cubic root of 72604331 is about 417.1774668415.

Adding to 72604331 its reverse (13340627), we get a palindrome (85944958).

The spelling of 72604331 in words is "seventy-two million, six hundred four thousand, three hundred thirty-one".