27428931 has 12 divisors (see below), whose sum is σ = 40367808. Its totient is φ = 17940624.

The previous prime is 27428909. The next prime is 27428953. The reversal of 27428931 is 13982472.

It is an interprime number because it is at equal distance from previous prime (27428909) and next prime (27428953).

It is not a de Polignac number, because 27428931 - 2⁵ = 27428899 is a prime.

It is a super-2 number, since 2×27428931² = 1504692511605522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27428971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28275 + ... + 29228.

It is an arithmetic number, because the mean of its divisors is an integer number (3363984).

Almost surely, 2^27428931 is an apocalyptic number.

27428931 is a deficient number, since it is larger than the sum of its proper divisors (12938877).

27428931 is a wasteful number, since it uses less digits than its factorization.

27428931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57562 (or 57559 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 27428931 is about 5237.2636939532. The cubic root of 27428931 is about 301.5802942832.

The spelling of 27428931 in words is "twenty-seven million, four hundred twenty-eight thousand, nine hundred thirty-one".