27983864 has 16 divisors (see below), whose sum is σ = 52980720. Its totient is φ = 13855680.

The previous prime is 27983863. The next prime is 27983881. The reversal of 27983864 is 46838972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27983861) 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, 16157 + ... + 17804.

It is an arithmetic number, because the mean of its divisors is an integer number (3311295).

Almost surely, 2^27983864 is an apocalyptic number.

It is an amenable number.

27983864 is a deficient number, since it is larger than the sum of its proper divisors (24996856).

27983864 is a wasteful number, since it uses less digits than its factorization.

27983864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34070 (or 34066 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 27983864 is about 5289.9776937148. The cubic root of 27983864 is about 303.6005545506.

The spelling of 27983864 in words is "twenty-seven million, nine hundred eighty-three thousand, eight hundred sixty-four".