27931488 has 48 divisors (see below), whose sum is σ = 78963696. Its totient is φ = 8593920.

The previous prime is 27931487. The next prime is 27931507. The reversal of 27931488 is 88413972.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27931481) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 9943 + ... + 12438.

It is an arithmetic number, because the mean of its divisors is an integer number (1645077).

Almost surely, 2^27931488 is an apocalyptic number.

It is an amenable number.

27931488 is an abundant number, since it is smaller than the sum of its proper divisors (51032208).

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

27931488 is a wasteful number, since it uses less digits than its factorization.

27931488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22407 (or 22399 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 27931488 is about 5285.0248816822. The cubic root of 27931488 is about 303.4110249276.

The spelling of 27931488 in words is "twenty-seven million, nine hundred thirty-one thousand, four hundred eighty-eight".