18498228 has 24 divisors (see below), whose sum is σ = 49328832. Its totient is φ = 5285184.

The previous prime is 18498209. The next prime is 18498241. The reversal of 18498228 is 82289481.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 18498228.

It is a congruent 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, 110025 + ... + 110192.

It is an arithmetic number, because the mean of its divisors is an integer number (2055368).

Almost surely, 2^18498228 is an apocalyptic number.

It is an amenable number.

18498228 is an abundant number, since it is smaller than the sum of its proper divisors (30830604).

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

18498228 is a wasteful number, since it uses less digits than its factorization.

18498228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220231 (or 220229 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 18498228 is about 4300.9566377726. The cubic root of 18498228 is about 264.4701791107.

The spelling of 18498228 in words is "eighteen million, four hundred ninety-eight thousand, two hundred twenty-eight".