27991276 has 12 divisors (see below), whose sum is σ = 51114672. Its totient is φ = 13387088.

The previous prime is 27991267. The next prime is 27991291. The reversal of 27991276 is 67219972.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152035 + ... + 152218.

It is an arithmetic number, because the mean of its divisors is an integer number (4259556).

Almost surely, 2^27991276 is an apocalyptic number.

It is an amenable number.

27991276 is a deficient number, since it is larger than the sum of its proper divisors (23123396).

27991276 is a wasteful number, since it uses less digits than its factorization.

27991276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304280 (or 304278 counting only the distinct ones).

The product of its digits is 95256, while the sum is 43.

The square root of 27991276 is about 5290.6782173933. The cubic root of 27991276 is about 303.6273567662.

The spelling of 27991276 in words is "twenty-seven million, nine hundred ninety-one thousand, two hundred seventy-six".