72286292 has 12 divisors (see below), whose sum is σ = 136231956. Its totient is φ = 33362880.

The previous prime is 72286289. The next prime is 72286301. The reversal of 72286292 is 29268227.

It can be written as a sum of positive squares in 2 ways, for example, as 37405456 + 34880836 = 6116^2 + 5906^2 .

It is a super-2 number, since 2×72286292² = 10450616022218528, which contains 22 as substring.

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, 695009 + ... + 695112.

It is an arithmetic number, because the mean of its divisors is an integer number (11352663).

Almost surely, 2^72286292 is an apocalyptic number.

It is an amenable number.

72286292 is a deficient number, since it is larger than the sum of its proper divisors (63945664).

72286292 is a wasteful number, since it uses less digits than its factorization.

72286292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390138 (or 1390136 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 72286292 is about 8502.1345555102. The cubic root of 72286292 is about 416.5674347869.

The spelling of 72286292 in words is "seventy-two million, two hundred eighty-six thousand, two hundred ninety-two".