18272344 has 8 divisors (see below), whose sum is σ = 34260660. Its totient is φ = 9136168.

The previous prime is 18272321. The next prime is 18272351. The reversal of 18272344 is 44327281.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1142014 + ... + 1142029.

Almost surely, 2^18272344 is an apocalyptic number.

It is an amenable number.

18272344 is a deficient number, since it is larger than the sum of its proper divisors (15988316).

18272344 is a wasteful number, since it uses less digits than its factorization.

18272344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284049 (or 2284045 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 18272344 is about 4274.6162400852. The cubic root of 18272344 is about 263.3892754442.

The spelling of 18272344 in words is "eighteen million, two hundred seventy-two thousand, three hundred forty-four".