72707504 has 20 divisors (see below), whose sum is σ = 149157864. Its totient is φ = 34215168.

The previous prime is 72707501. The next prime is 72707549. The reversal of 72707504 is 40570727.

It is a happy number.

It is a super-2 number, since 2×72707504² = 10572762275820032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72707501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133382 + ... + 133925.

Almost surely, 2^72707504 is an apocalyptic number.

It is an amenable number.

72707504 is an abundant number, since it is smaller than the sum of its proper divisors (76450360).

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

72707504 is a wasteful number, since it uses less digits than its factorization.

72707504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267332 (or 267326 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 72707504 is about 8526.8695310765. The cubic root of 72707504 is about 417.3749806745.

The spelling of 72707504 in words is "seventy-two million, seven hundred seven thousand, five hundred four".