27981924 has 24 divisors (see below), whose sum is σ = 65436000. Its totient is φ = 9306624.

The previous prime is 27981923. The next prime is 27981929. The reversal of 27981924 is 42918972.

It is not an unprimeable number, because it can be changed into a prime (27981923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3652 + ... + 8324.

It is an arithmetic number, because the mean of its divisors is an integer number (2726500).

Almost surely, 2^27981924 is an apocalyptic number.

It is an amenable number.

27981924 is an abundant number, since it is smaller than the sum of its proper divisors (37454076).

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

27981924 is a wasteful number, since it uses less digits than its factorization.

27981924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5179 (or 5177 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 27981924 is about 5289.7943249242. The cubic root of 27981924 is about 303.5935386183.

The spelling of 27981924 in words is "twenty-seven million, nine hundred eighty-one thousand, nine hundred twenty-four".