45444720 has 40 divisors (see below), whose sum is σ = 140879376. Its totient is φ = 12118528.

The previous prime is 45444709. The next prime is 45444727. The reversal of 45444720 is 2744454.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45444727) 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, 94437 + ... + 94916.

Almost surely, 2^45444720 is an apocalyptic number.

45444720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45444720 is an abundant number, since it is smaller than the sum of its proper divisors (95434656).

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

45444720 is a wasteful number, since it uses less digits than its factorization.

45444720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189369 (or 189363 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 30.

The square root of 45444720 is about 6741.2699100392. The cubic root of 45444720 is about 356.8572112942.

It can be divided in two parts, 45444 and 720, that added together give a palindrome (46164).

The spelling of 45444720 in words is "forty-five million, four hundred forty-four thousand, seven hundred twenty".