18115272 has 64 divisors (see below), whose sum is σ = 57513600. Its totient is φ = 5175360.

The previous prime is 18115261. The next prime is 18115277. The reversal of 18115272 is 27251181.

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

It is not an unprimeable number, because it can be changed into a prime (18115277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4479 + ... + 7502.

It is an arithmetic number, because the mean of its divisors is an integer number (898650).

Almost surely, 2^18115272 is an apocalyptic number.

18115272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18115272 is an abundant number, since it is smaller than the sum of its proper divisors (39398328).

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

18115272 is a wasteful number, since it uses less digits than its factorization.

18115272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12003 (or 11993 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 18115272 is about 4256.2039424821. The cubic root of 18115272 is about 262.6323903613.

The spelling of 18115272 in words is "eighteen million, one hundred fifteen thousand, two hundred seventy-two".