72855616 has 14 divisors (see below), whose sum is σ = 144572990. Its totient is φ = 36427776.

The previous prime is 72855581. The next prime is 72855623. The reversal of 72855616 is 61655827.

It can be written as a sum of positive squares in only one way, i.e., 66585600 + 6270016 = 8160^2 + 2504^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569121 + ... + 569248.

Almost surely, 2^72855616 is an apocalyptic number.

It is an amenable number.

72855616 is a deficient number, since it is larger than the sum of its proper divisors (71717374).

72855616 is a wasteful number, since it uses less digits than its factorization.

72855616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138381 (or 1138371 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 72855616 is about 8535.5501287263. The cubic root of 72855616 is about 417.6581990984.

The spelling of 72855616 in words is "seventy-two million, eight hundred fifty-five thousand, six hundred sixteen".