27986964 has 24 divisors (see below), whose sum is σ = 69144768. Its totient is φ = 8780160.

The previous prime is 27986963. The next prime is 27987007. The reversal of 27986964 is 46968972.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27986963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68392 + ... + 68799.

It is an arithmetic number, because the mean of its divisors is an integer number (2881032).

Almost surely, 2^27986964 is an apocalyptic number.

It is an amenable number.

27986964 is an abundant number, since it is smaller than the sum of its proper divisors (41157804).

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

27986964 is a wasteful number, since it uses less digits than its factorization.

27986964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137215 (or 137213 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 27986964 is about 5290.2706925071. The cubic root of 27986964 is about 303.6117649035.

The spelling of 27986964 in words is "twenty-seven million, nine hundred eighty-six thousand, nine hundred sixty-four".