18868272 has 40 divisors (see below), whose sum is σ = 49478976. Its totient is φ = 6194496.

The previous prime is 18868231. The next prime is 18868279. The reversal of 18868272 is 27286881.

It is not an unprimeable number, because it can be changed into a prime (18868279) 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, 283 + ... + 6149.

Almost surely, 2^18868272 is an apocalyptic number.

18868272 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 18868272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24739488).

18868272 is an abundant number, since it is smaller than the sum of its proper divisors (30610704).

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

18868272 is a wasteful number, since it uses less digits than its factorization.

18868272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945 (or 5939 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 18868272 is about 4343.7624244427. The cubic root of 18868272 is about 266.2220619145. Note that the first 3 decimals are identical.

The spelling of 18868272 in words is "eighteen million, eight hundred sixty-eight thousand, two hundred seventy-two".