18404800 has 42 divisors (see below), whose sum is σ = 45291248. Its totient is φ = 7361280.

The previous prime is 18404797. The next prime is 18404839. The reversal of 18404800 is 840481.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4152 + ... + 7351.

Almost surely, 2^18404800 is an apocalyptic number.

18404800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18404800 is an abundant number, since it is smaller than the sum of its proper divisors (26886448).

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

18404800 is a wasteful number, since it uses less digits than its factorization.

18404800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11525 (or 11510 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 18404800 is about 4290.0815843058. The cubic root of 18404800 is about 264.0241789914.

The spelling of 18404800 in words is "eighteen million, four hundred four thousand, eight hundred".