18228250 has 32 divisors (see below), whose sum is σ = 36138960. Its totient is φ = 6860800.

The previous prime is 18228241. The next prime is 18228263. The reversal of 18228250 is 5282281.

It can be written as a sum of positive squares in 8 ways, for example, as 5774409 + 12453841 = 2403^2 + 3529^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2106 + ... + 6394.

Almost surely, 2^18228250 is an apocalyptic number.

18228250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18228250 is a deficient number, since it is larger than the sum of its proper divisors (17910710).

18228250 is a wasteful number, since it uses less digits than its factorization.

18228250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323 (or 4313 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 18228250 is about 4269.4554687922. The cubic root of 18228250 is about 263.1772384027.

The spelling of 18228250 in words is "eighteen million, two hundred twenty-eight thousand, two hundred fifty".