18304272 has 80 divisors (see below), whose sum is σ = 60055680. Its totient is φ = 5228928.

The previous prime is 18304267. The next prime is 18304301. The reversal of 18304272 is 27240381.

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

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, 3 + ... + 6050.

It is an arithmetic number, because the mean of its divisors is an integer number (750696).

Almost surely, 2^18304272 is an apocalyptic number.

18304272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18304272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30027840).

18304272 is an abundant number, since it is smaller than the sum of its proper divisors (41751408).

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

18304272 is a wasteful number, since it uses less digits than its factorization.

18304272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6077 (or 6065 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18304272 is about 4278.3492143583. The cubic root of 18304272 is about 263.5425963948.

The spelling of 18304272 in words is "eighteen million, three hundred four thousand, two hundred seventy-two".