45172992 has 72 divisors (see below), whose sum is σ = 121413600. Its totient is φ = 14909440.

The previous prime is 45172991. The next prime is 45173003. The reversal of 45172992 is 29927154.

It is a self number, because there is not a number n which added to its sum of digits gives 45172992.

It is not an unprimeable number, because it can be changed into a prime (45172991) 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, 100384 + ... + 100832.

It is an arithmetic number, because the mean of its divisors is an integer number (1686300).

Almost surely, 2^45172992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45172992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60706800).

45172992 is an abundant number, since it is smaller than the sum of its proper divisors (76240608).

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

45172992 is a wasteful number, since it uses less digits than its factorization.

45172992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 585 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 45172992 is about 6721.0856265934. The cubic root of 45172992 is about 356.1445358483.

It can be divided in two parts, 45172 and 992, that added together give a palindrome (46164).

The spelling of 45172992 in words is "forty-five million, one hundred seventy-two thousand, nine hundred ninety-two".