18000456 has 16 divisors (see below), whose sum is σ = 45001200. Its totient is φ = 6000144.

The previous prime is 18000439. The next prime is 18000457. The reversal of 18000456 is 65400081.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 750019 = 18000456 / (1 + 8 + 0 + 0 + 0 + 4 + 5 + 6).

It is not an unprimeable number, because it can be changed into a prime (18000457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374986 + ... + 375033.

It is an arithmetic number, because the mean of its divisors is an integer number (2812575).

Almost surely, 2^18000456 is an apocalyptic number.

It is an amenable number.

18000456 is an abundant number, since it is smaller than the sum of its proper divisors (27000744).

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

18000456 is a wasteful number, since it uses less digits than its factorization.

18000456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750028 (or 750024 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 18000456 is about 4242.6944268943. The cubic root of 18000456 is about 262.0763524727.

The spelling of 18000456 in words is "eighteen million, four hundred fifty-six", and thus it is an aban number.