45991172 has 12 divisors (see below), whose sum is σ = 84720720. Its totient is φ = 21785256.

The previous prime is 45991163. The next prime is 45991177. The reversal of 45991172 is 27119954.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (45991177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302498 + ... + 302649.

It is an arithmetic number, because the mean of its divisors is an integer number (7060060).

Almost surely, 2^45991172 is an apocalyptic number.

It is an amenable number.

45991172 is a deficient number, since it is larger than the sum of its proper divisors (38729548).

45991172 is a wasteful number, since it uses less digits than its factorization.

45991172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605170 (or 605168 counting only the distinct ones).

The product of its digits is 22680, while the sum is 38.

The square root of 45991172 is about 6781.6791431031. The cubic root of 45991172 is about 358.2818645144.

The spelling of 45991172 in words is "forty-five million, nine hundred ninety-one thousand, one hundred seventy-two".