45640172 has 24 divisors (see below), whose sum is σ = 85022784. Its totient is φ = 21362432.

The previous prime is 45640169. The next prime is 45640187. The reversal of 45640172 is 27104654.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11693 + ... + 15099.

It is an arithmetic number, because the mean of its divisors is an integer number (3542616).

Almost surely, 2^45640172 is an apocalyptic number.

It is an amenable number.

45640172 is a deficient number, since it is larger than the sum of its proper divisors (39382612).

45640172 is a wasteful number, since it uses less digits than its factorization.

45640172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3625 (or 3623 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 45640172 is about 6755.7510315286. The cubic root of 45640172 is about 357.3680788625.

The spelling of 45640172 in words is "forty-five million, six hundred forty thousand, one hundred seventy-two".