72251736 has 16 divisors (see below), whose sum is σ = 180629400. Its totient is φ = 24083904.

The previous prime is 72251701. The next prime is 72251743. The reversal of 72251736 is 63715227.

It is a junction number, because it is equal to n+sod(n) for n = 72251697 and 72251706.

It is a congruent number.

It is an unprimeable number.

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, 1505221 + ... + 1505268.

Almost surely, 2^72251736 is an apocalyptic number.

It is an amenable number.

72251736 is an abundant number, since it is smaller than the sum of its proper divisors (108377664).

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

72251736 is a wasteful number, since it uses less digits than its factorization.

72251736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010498 (or 3010494 counting only the distinct ones).

The product of its digits is 17640, while the sum is 33.

The square root of 72251736 is about 8500.1021170337. The cubic root of 72251736 is about 416.5010450733.

The spelling of 72251736 in words is "seventy-two million, two hundred fifty-one thousand, seven hundred thirty-six".