27431992 has 32 divisors (see below), whose sum is σ = 58982400. Its totient is φ = 11716704.

The previous prime is 27431977. The next prime is 27432001. The reversal of 27431992 is 29913472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20809 + ... + 22087.

It is an arithmetic number, because the mean of its divisors is an integer number (1843200).

Almost surely, 2^27431992 is an apocalyptic number.

It is an amenable number.

27431992 is an abundant number, since it is smaller than the sum of its proper divisors (31550408).

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

27431992 is a wasteful number, since it uses less digits than its factorization.

27431992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675 (or 1671 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 27431992 is about 5237.5559185559. Note that the first 3 decimals coincide. The cubic root of 27431992 is about 301.5915124011.

The spelling of 27431992 in words is "twenty-seven million, four hundred thirty-one thousand, nine hundred ninety-two".