45990432 has 144 divisors (see below), whose sum is σ = 140107968. Its totient is φ = 14277120.

The previous prime is 45990421. The next prime is 45990437. The reversal of 45990432 is 23409954.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (45990437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351007 + ... + 351137.

It is an arithmetic number, because the mean of its divisors is an integer number (972972).

Almost surely, 2^45990432 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 45990432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70053984).

45990432 is an abundant number, since it is smaller than the sum of its proper divisors (94117536).

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

45990432 is a wasteful number, since it uses less digits than its factorization.

45990432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 45990432 is about 6781.6245841244. The cubic root of 45990432 is about 358.2799429137.

The spelling of 45990432 in words is "forty-five million, nine hundred ninety thousand, four hundred thirty-two".