18272328 has 16 divisors (see below), whose sum is σ = 45680880. Its totient is φ = 6090768.

The previous prime is 18272321. The next prime is 18272351. The reversal of 18272328 is 82327281.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18272321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380650 + ... + 380697.

It is an arithmetic number, because the mean of its divisors is an integer number (2855055).

Almost surely, 2^18272328 is an apocalyptic number.

It is an amenable number.

18272328 is an abundant number, since it is smaller than the sum of its proper divisors (27408552).

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

18272328 is a wasteful number, since it uses less digits than its factorization.

18272328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761356 (or 761352 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 18272328 is about 4274.6143685717. The cubic root of 18272328 is about 263.3891985661.

The spelling of 18272328 in words is "eighteen million, two hundred seventy-two thousand, three hundred twenty-eight".