72507056 has 20 divisors (see below), whose sum is σ = 141849552. Its totient is φ = 35900736.

The previous prime is 72507011. The next prime is 72507077. The reversal of 72507056 is 65070527.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20351 + ... + 23646.

Almost surely, 2^72507056 is an apocalyptic number.

It is an amenable number.

72507056 is a deficient number, since it is larger than the sum of its proper divisors (69342496).

72507056 is a wasteful number, since it uses less digits than its factorization.

72507056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44108 (or 44102 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 72507056 is about 8515.1075154692. The cubic root of 72507056 is about 416.9910726580.

Subtracting from 72507056 its reverse (65070527), we obtain a square (7436529 = 2727²).

The spelling of 72507056 in words is "seventy-two million, five hundred seven thousand, fifty-six".