72164276 has 12 divisors (see below), whose sum is σ = 127136100. Its totient is φ = 35839680.

The previous prime is 72164251. The next prime is 72164291. The reversal of 72164276 is 67246127.

It can be written as a sum of positive squares in 2 ways, for example, as 15523600 + 56640676 = 3940^2 + 7526^2 .

It is a congruent number.

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, 59945 + ... + 61136.

It is an arithmetic number, because the mean of its divisors is an integer number (10594675).

Almost surely, 2^72164276 is an apocalyptic number.

It is an amenable number.

72164276 is a deficient number, since it is larger than the sum of its proper divisors (54971824).

72164276 is a wasteful number, since it uses less digits than its factorization.

72164276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121234 (or 121232 counting only the distinct ones).

The product of its digits is 28224, while the sum is 35.

The square root of 72164276 is about 8494.9559151299. The cubic root of 72164276 is about 416.3329204415.

The spelling of 72164276 in words is "seventy-two million, one hundred sixty-four thousand, two hundred seventy-six".