72657272 has 16 divisors (see below), whose sum is σ = 139401240. Its totient is φ = 35483616.

The previous prime is 72657271. The next prime is 72657281. The reversal of 72657272 is 27275627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72657271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105263 + ... + 105950.

Almost surely, 2^72657272 is an apocalyptic number.

It is an amenable number.

72657272 is a deficient number, since it is larger than the sum of its proper divisors (66743968).

72657272 is a wasteful number, since it uses less digits than its factorization.

72657272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211262 (or 211258 counting only the distinct ones).

The product of its digits is 82320, while the sum is 38.

The square root of 72657272 is about 8523.9235097460. The cubic root of 72657272 is about 417.2788401620.

The spelling of 72657272 in words is "seventy-two million, six hundred fifty-seven thousand, two hundred seventy-two".