27880931 has 4 divisors (see below), whose sum is σ = 30025632. Its totient is φ = 25736232.

The previous prime is 27880927. The next prime is 27880933. The reversal of 27880931 is 13908872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27880931 - 2² = 27880927 is a prime.

It is a super-2 number, since 2×27880931² = 1554692626853522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27880933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072331 + ... + 1072356.

It is an arithmetic number, because the mean of its divisors is an integer number (7506408).

Almost surely, 2^27880931 is an apocalyptic number.

27880931 is a deficient number, since it is larger than the sum of its proper divisors (2144701).

27880931 is a wasteful number, since it uses less digits than its factorization.

27880931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144700.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 27880931 is about 5280.2396725906. The cubic root of 27880931 is about 303.2278527368.

The spelling of 27880931 in words is "twenty-seven million, eight hundred eighty thousand, nine hundred thirty-one".