18103228 has 24 divisors (see below), whose sum is σ = 37220400. Its totient is φ = 7595520.

The previous prime is 18103201. The next prime is 18103237. The reversal of 18103228 is 82230181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15253 + ... + 16396.

It is an arithmetic number, because the mean of its divisors is an integer number (1550850).

Almost surely, 2^18103228 is an apocalyptic number.

It is an amenable number.

18103228 is an abundant number, since it is smaller than the sum of its proper divisors (19117172).

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

18103228 is a wasteful number, since it uses less digits than its factorization.

18103228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31677 (or 31675 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18103228 is about 4254.7888314228. The cubic root of 18103228 is about 262.5741734458.

The spelling of 18103228 in words is "eighteen million, one hundred three thousand, two hundred twenty-eight".