18028224 has 56 divisors (see below), whose sum is σ = 53004720. Its totient is φ = 6008832.

The previous prime is 18028189. The next prime is 18028229. The reversal of 18028224 is 42282081.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18028229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3489 + ... + 6944.

Almost surely, 2^18028224 is an apocalyptic number.

It is an amenable number.

18028224 is an abundant number, since it is smaller than the sum of its proper divisors (34976496).

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

18028224 is a wasteful number, since it uses less digits than its factorization.

18028224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10454 (or 10438 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 18028224 is about 4245.9656145570. The cubic root of 18028224 is about 262.2110453065.

The spelling of 18028224 in words is "eighteen million, twenty-eight thousand, two hundred twenty-four".