18648272 has 20 divisors (see below), whose sum is σ = 38033280. Its totient is φ = 8833248.

The previous prime is 18648263. The next prime is 18648313. The reversal of 18648272 is 27284681.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30368 + ... + 30975.

It is an arithmetic number, because the mean of its divisors is an integer number (1901664).

Almost surely, 2^18648272 is an apocalyptic number.

It is an amenable number.

18648272 is an abundant number, since it is smaller than the sum of its proper divisors (19385008).

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

18648272 is a wasteful number, since it uses less digits than its factorization.

18648272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61370 (or 61364 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 18648272 is about 4318.3645052265. The cubic root of 18648272 is about 265.1833168521.

The spelling of 18648272 in words is "eighteen million, six hundred forty-eight thousand, two hundred seventy-two".