18198928 has 40 divisors (see below), whose sum is σ = 39211776. Its totient is φ = 8112000.

The previous prime is 18198899. The next prime is 18198937. The reversal of 18198928 is 82989181.

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, 8353 + ... + 10303.

Almost surely, 2^18198928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18198928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19605888).

18198928 is an abundant number, since it is smaller than the sum of its proper divisors (21012848).

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

18198928 is a wasteful number, since it uses less digits than its factorization.

18198928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023 (or 2017 counting only the distinct ones).

The product of its digits is 82944, while the sum is 46.

The square root of 18198928 is about 4266.0201593523. The cubic root of 18198928 is about 263.0360468550.

The spelling of 18198928 in words is "eighteen million, one hundred ninety-eight thousand, nine hundred twenty-eight".