27931392 has 108 divisors (see below), whose sum is σ = 83701800. Its totient is φ = 9289728.

The previous prime is 27931363. The next prime is 27931439. The reversal of 27931392 is 29313972.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61984 + ... + 62432.

Almost surely, 2^27931392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27931392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41850900).

27931392 is an abundant number, since it is smaller than the sum of its proper divisors (55770408).

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

27931392 is an frugal number, since it uses more digits than its factorization.

27931392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 454 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 27931392 is about 5285.0157994087. The cubic root of 27931392 is about 303.4106773212.

The spelling of 27931392 in words is "twenty-seven million, nine hundred thirty-one thousand, three hundred ninety-two".