27791856 has 40 divisors (see below), whose sum is σ = 79774160. Its totient is φ = 9263808.

The previous prime is 27791849. The next prime is 27791861. The reversal of 27791856 is 65819772.

It is a congruent number.

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, 31735 + ... + 32598.

It is an arithmetic number, because the mean of its divisors is an integer number (1994354).

Almost surely, 2^27791856 is an apocalyptic number.

It is an amenable number.

27791856 is an abundant number, since it is smaller than the sum of its proper divisors (51982304).

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

27791856 is a wasteful number, since it uses less digits than its factorization.

27791856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64350 (or 64338 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 27791856 is about 5271.7981751960. The cubic root of 27791856 is about 302.9045871526.

The spelling of 27791856 in words is "twenty-seven million, seven hundred ninety-one thousand, eight hundred fifty-six".