27981592 has 32 divisors (see below), whose sum is σ = 57352320. Its totient is φ = 12741120.

The previous prime is 27981587. The next prime is 27981601. The reversal of 27981592 is 29518972.

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, 898 + ... + 7534.

It is an arithmetic number, because the mean of its divisors is an integer number (1792260).

Almost surely, 2^27981592 is an apocalyptic number.

It is an amenable number.

27981592 is an abundant number, since it is smaller than the sum of its proper divisors (29370728).

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

27981592 is a wasteful number, since it uses less digits than its factorization.

27981592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6691 (or 6687 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 27981592 is about 5289.7629436488. The cubic root of 27981592 is about 303.5923379211.

The spelling of 27981592 in words is "twenty-seven million, nine hundred eighty-one thousand, five hundred ninety-two".