72258172 has 12 divisors (see below), whose sum is σ = 144516400. Its totient is φ = 30967776.

The previous prime is 72258167. The next prime is 72258187. The reversal of 72258172 is 27185227.

72258172 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1290297 + ... + 1290352.

Almost surely, 2^72258172 is an apocalyptic number.

It is an amenable number.

72258172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72258172 is a wasteful number, since it uses less digits than its factorization.

72258172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580660 (or 2580658 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 72258172 is about 8500.4806922903. The cubic root of 72258172 is about 416.5134116557.

The spelling of 72258172 in words is "seventy-two million, two hundred fifty-eight thousand, one hundred seventy-two".