18398056 has 32 divisors (see below), whose sum is σ = 35562240. Its totient is φ = 8918848.

The previous prime is 18398021. The next prime is 18398069. The reversal of 18398056 is 65089381.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62646 + ... + 62938.

It is an arithmetic number, because the mean of its divisors is an integer number (1111320).

Almost surely, 2^18398056 is an apocalyptic number.

It is an amenable number.

18398056 is a deficient number, since it is larger than the sum of its proper divisors (17164184).

18398056 is a wasteful number, since it uses less digits than its factorization.

18398056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18398056 is about 4289.2955132516. The cubic root of 18398056 is about 263.9919265973.

The spelling of 18398056 in words is "eighteen million, three hundred ninety-eight thousand, fifty-six".