72769636 has 12 divisors (see below), whose sum is σ = 129750012. Its totient is φ = 35698208.

The previous prime is 72769621. The next prime is 72769661. The reversal of 72769636 is 63696727.

It can be written as a sum of positive squares in 2 ways, for example, as 62884900 + 9884736 = 7930^2 + 3144^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171415 + ... + 171838.

It is an arithmetic number, because the mean of its divisors is an integer number (10812501).

Almost surely, 2^72769636 is an apocalyptic number.

It is an amenable number.

72769636 is a deficient number, since it is larger than the sum of its proper divisors (56980376).

72769636 is a wasteful number, since it uses less digits than its factorization.

72769636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343310 (or 343308 counting only the distinct ones).

The product of its digits is 571536, while the sum is 46.

The square root of 72769636 is about 8530.5120596597. The cubic root of 72769636 is about 417.4938357104.

The spelling of 72769636 in words is "seventy-two million, seven hundred sixty-nine thousand, six hundred thirty-six".