18995228 has 12 divisors (see below), whose sum is σ = 37990512. Its totient is φ = 8140800.

The previous prime is 18995213. The next prime is 18995233. The reversal of 18995228 is 82259981.

18995228 is an admirable number.

It is a congruent 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, 339173 + ... + 339228.

It is an arithmetic number, because the mean of its divisors is an integer number (3165876).

Almost surely, 2^18995228 is an apocalyptic number.

It is an amenable number.

18995228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18995228 is a wasteful number, since it uses less digits than its factorization.

18995228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678412 (or 678410 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 18995228 is about 4358.3515232253. The cubic root of 18995228 is about 266.8178233303.

The spelling of 18995228 in words is "eighteen million, nine hundred ninety-five thousand, two hundred twenty-eight".