72511328 has 12 divisors (see below), whose sum is σ = 142756740. Its totient is φ = 36255648.

The previous prime is 72511259. The next prime is 72511331. The reversal of 72511328 is 82311527.

It is a self number, because there is not a number n which added to its sum of digits gives 72511328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1132958 + ... + 1133021.

It is an arithmetic number, because the mean of its divisors is an integer number (11896395).

Almost surely, 2^72511328 is an apocalyptic number.

It is an amenable number.

72511328 is a deficient number, since it is larger than the sum of its proper divisors (70245412).

72511328 is a wasteful number, since it uses less digits than its factorization.

72511328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265989 (or 2265981 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 72511328 is about 8515.3583600457. The cubic root of 72511328 is about 416.9992619800. Note that the first 3 decimals are identical.

The spelling of 72511328 in words is "seventy-two million, five hundred eleven thousand, three hundred twenty-eight".