45039872 has 18 divisors (see below), whose sum is σ = 89904318. Its totient is φ = 22519808.

The previous prime is 45039857. The next prime is 45039881. The reversal of 45039872 is 27893054.

It can be written as a sum of positive squares in only one way, i.e., 23658496 + 21381376 = 4864^2 + 4624^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87713 + ... + 88224.

Almost surely, 2^45039872 is an apocalyptic number.

It is an amenable number.

45039872 is a deficient number, since it is larger than the sum of its proper divisors (44864446).

45039872 is an equidigital number, since it uses as much as digits as its factorization.

45039872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175953 (or 175939 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 45039872 is about 6711.1751578990. The cubic root of 45039872 is about 355.7943516224.

The spelling of 45039872 in words is "forty-five million, thirty-nine thousand, eight hundred seventy-two".