72957556 has 12 divisors (see below), whose sum is σ = 145915168. Its totient is φ = 31267512.

The previous prime is 72957529. The next prime is 72957559. The reversal of 72957556 is 65575927.

72957556 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72957559) 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, 1302786 + ... + 1302841.

Almost surely, 2^72957556 is an apocalyptic number.

It is an amenable number.

72957556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72957556 is a wasteful number, since it uses less digits than its factorization.

72957556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2605638 (or 2605636 counting only the distinct ones).

The product of its digits is 661500, while the sum is 46.

The square root of 72957556 is about 8541.5195369442. The cubic root of 72957556 is about 417.8529049061.

It can be divided in two parts, 729 and 57556, that added together give a palindrome (58285).

The spelling of 72957556 in words is "seventy-two million, nine hundred fifty-seven thousand, five hundred fifty-six".