45172272 has 40 divisors (see below), whose sum is σ = 122839360. Its totient is φ = 14264640.

The previous prime is 45172243. The next prime is 45172273. The reversal of 45172272 is 27227154.

It is not an unprimeable number, because it can be changed into a prime (45172273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23854 + ... + 25677.

It is an arithmetic number, because the mean of its divisors is an integer number (3070984).

Almost surely, 2^45172272 is an apocalyptic number.

It is an amenable number.

45172272 is an abundant number, since it is smaller than the sum of its proper divisors (77667088).

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

45172272 is a wasteful number, since it uses less digits than its factorization.

45172272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49561 (or 49555 counting only the distinct ones).

The product of its digits is 7840, while the sum is 30.

The square root of 45172272 is about 6721.0320636045. The cubic root of 45172272 is about 356.1426436747.

The spelling of 45172272 in words is "forty-five million, one hundred seventy-two thousand, two hundred seventy-two".