27931472 has 10 divisors (see below), whose sum is σ = 54117258. Its totient is φ = 13965728.

The previous prime is 27931469. The next prime is 27931481. The reversal of 27931472 is 27413972.

It can be written as a sum of positive squares in only one way, i.e., 27920656 + 10816 = 5284^2 + 104^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 872843 + ... + 872874.

Almost surely, 2^27931472 is an apocalyptic number.

It is an amenable number.

27931472 is a deficient number, since it is larger than the sum of its proper divisors (26185786).

27931472 is a wasteful number, since it uses less digits than its factorization.

27931472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745725 (or 1745719 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 27931472 is about 5285.0233679710. The cubic root of 27931472 is about 303.4109669933.

The spelling of 27931472 in words is "twenty-seven million, nine hundred thirty-one thousand, four hundred seventy-two".