72157372 has 12 divisors (see below), whose sum is σ = 144314800. Its totient is φ = 30924576.

The previous prime is 72157339. The next prime is 72157387. The reversal of 72157372 is 27375127.

It is a happy number.

72157372 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288497 + ... + 1288552.

Almost surely, 2^72157372 is an apocalyptic number.

It is an amenable number.

72157372 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.

72157372 is a wasteful number, since it uses less digits than its factorization.

72157372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577060 (or 2577058 counting only the distinct ones).

The product of its digits is 20580, while the sum is 34.

The square root of 72157372 is about 8494.5495466211. The cubic root of 72157372 is about 416.3196430771.

The spelling of 72157372 in words is "seventy-two million, one hundred fifty-seven thousand, three hundred seventy-two".