18272244 has 24 divisors (see below), whose sum is σ = 42767200. Its totient is φ = 6071904.

The previous prime is 18272239. The next prime is 18272249. The reversal of 18272244 is 44227281.

It is an interprime number because it is at equal distance from previous prime (18272239) and next prime (18272249).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18272249) 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, 2007 + ... + 6369.

Almost surely, 2^18272244 is an apocalyptic number.

It is an amenable number.

18272244 is an abundant number, since it is smaller than the sum of its proper divisors (24494956).

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

18272244 is a wasteful number, since it uses less digits than its factorization.

18272244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719 (or 4717 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 18272244 is about 4274.6045431127. The cubic root of 18272244 is about 263.3887949553.

The spelling of 18272244 in words is "eighteen million, two hundred seventy-two thousand, two hundred forty-four".