27861964 has 24 divisors (see below), whose sum is σ = 52905888. Its totient is φ = 12762240.

The previous prime is 27861949. The next prime is 27861971. The reversal of 27861964 is 46916872.

It is a self number, because there is not a number n which added to its sum of digits gives 27861964.

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, 5169 + ... + 9079.

It is an arithmetic number, because the mean of its divisors is an integer number (2204412).

Almost surely, 2^27861964 is an apocalyptic number.

It is an amenable number.

27861964 is a deficient number, since it is larger than the sum of its proper divisors (25043924).

27861964 is a wasteful number, since it uses less digits than its factorization.

27861964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065 (or 4063 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 27861964 is about 5278.4433311347. The cubic root of 27861964 is about 303.1590766098.

The spelling of 27861964 in words is "twenty-seven million, eight hundred sixty-one thousand, nine hundred sixty-four".