18056456 has 16 divisors (see below), whose sum is σ = 36933840. Its totient is φ = 8207440.

The previous prime is 18056417. The next prime is 18056461. The reversal of 18056456 is 65465081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102506 + ... + 102681.

It is an arithmetic number, because the mean of its divisors is an integer number (2308365).

Almost surely, 2^18056456 is an apocalyptic number.

It is an amenable number.

18056456 is an abundant number, since it is smaller than the sum of its proper divisors (18877384).

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

18056456 is a wasteful number, since it uses less digits than its factorization.

18056456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205204 (or 205200 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 18056456 is about 4249.2888816836. The cubic root of 18056456 is about 262.3478471232.

The spelling of 18056456 in words is "eighteen million, fifty-six thousand, four hundred fifty-six".