18044790 has 32 divisors (see below), whose sum is σ = 44706816. Its totient is φ = 4656480.

The previous prime is 18044783. The next prime is 18044809. The reversal of 18044790 is 9744081.

It is a super-2 number, since 2×18044790² = 651228892288200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8772 + ... + 10631.

It is an arithmetic number, because the mean of its divisors is an integer number (1397088).

Almost surely, 2^18044790 is an apocalyptic number.

18044790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18044790 is an abundant number, since it is smaller than the sum of its proper divisors (26662026).

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

18044790 is a wasteful number, since it uses less digits than its factorization.

18044790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19444.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18044790 is about 4247.9159596207. The cubic root of 18044790 is about 262.2913353074.

The spelling of 18044790 in words is "eighteen million, forty-four thousand, seven hundred ninety".