45811990 has 32 divisors (see below), whose sum is σ = 94556160. Its totient is φ = 15654624.

The previous prime is 45811979. The next prime is 45811993. The reversal of 45811990 is 9911854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45811993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24219 + ... + 26041.

It is an arithmetic number, because the mean of its divisors is an integer number (2954880).

Almost surely, 2^45811990 is an apocalyptic number.

45811990 is an abundant number, since it is smaller than the sum of its proper divisors (48744170).

45811990 is a wasteful number, since it uses less digits than its factorization.

45811990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 45811990 is about 6768.4555106760. The cubic root of 45811990 is about 357.8159692080.

The spelling of 45811990 in words is "forty-five million, eight hundred eleven thousand, nine hundred ninety".