18998448 has 40 divisors (see below), whose sum is σ = 56091648. Its totient is φ = 5428032.

The previous prime is 18998411. The next prime is 18998471. The reversal of 18998448 is 84489981.

It is a self number, because there is not a number n which added to its sum of digits gives 18998448.

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, 27936 + ... + 28607.

Almost surely, 2^18998448 is an apocalyptic number.

It is an amenable number.

18998448 is an abundant number, since it is smaller than the sum of its proper divisors (37093200).

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

18998448 is a wasteful number, since it uses less digits than its factorization.

18998448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56561 (or 56555 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 18998448 is about 4358.7209132956. The cubic root of 18998448 is about 266.8328991316.

The spelling of 18998448 in words is "eighteen million, nine hundred ninety-eight thousand, four hundred forty-eight".