18840492 has 48 divisors (see below), whose sum is σ = 53289600. Its totient is φ = 5708880.

The previous prime is 18840463. The next prime is 18840509. The reversal of 18840492 is 29404881.

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

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, 6742 + ... + 9117.

It is an arithmetic number, because the mean of its divisors is an integer number (1110200).

Almost surely, 2^18840492 is an apocalyptic number.

18840492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18840492 is an abundant number, since it is smaller than the sum of its proper divisors (34449108).

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

18840492 is a wasteful number, since it uses less digits than its factorization.

18840492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15883 (or 15875 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18840492 is about 4340.5635578805. The cubic root of 18840492 is about 266.0913436834.

The spelling of 18840492 in words is "eighteen million, eight hundred forty thousand, four hundred ninety-two".