45637890 has 48 divisors (see below), whose sum is σ = 113249664. Its totient is φ = 11770080.

The previous prime is 45637871. The next prime is 45637901. The reversal of 45637890 is 9873654.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28039 + ... + 29621.

It is an arithmetic number, because the mean of its divisors is an integer number (2359368).

Almost surely, 2^45637890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45637890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56624832).

45637890 is an abundant number, since it is smaller than the sum of its proper divisors (67611774).

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

45637890 is a wasteful number, since it uses less digits than its factorization.

45637890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 1624 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 45637890 is about 6755.5821362781. The cubic root of 45637890 is about 357.3621226511.

The spelling of 45637890 in words is "forty-five million, six hundred thirty-seven thousand, eight hundred ninety".