45232720 has 160 divisors (see below), whose sum is σ = 123992064. Its totient is φ = 15206400.

The previous prime is 45232687. The next prime is 45232729. The reversal of 45232720 is 2723254.

It is a super-4 number, since 4×45232720⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45232729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 741490 + ... + 741550.

Almost surely, 2^45232720 is an apocalyptic number.

45232720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45232720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61996032).

45232720 is an abundant number, since it is smaller than the sum of its proper divisors (78759344).

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

45232720 is a wasteful number, since it uses less digits than its factorization.

45232720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 45232720 is about 6725.5274886064. The cubic root of 45232720 is about 356.3014321968.

Adding to 45232720 its reverse (2723254), we get a palindrome (47955974).

The spelling of 45232720 in words is "forty-five million, two hundred thirty-two thousand, seven hundred twenty".