27856668 has 48 divisors (see below), whose sum is σ = 74559744. Its totient is φ = 7929600.

The previous prime is 27856649. The next prime is 27856669. The reversal of 27856668 is 86665872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27856669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33271 + ... + 34097.

It is an arithmetic number, because the mean of its divisors is an integer number (1553328).

Almost surely, 2^27856668 is an apocalyptic number.

27856668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27856668 is an abundant number, since it is smaller than the sum of its proper divisors (46703076).

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

27856668 is a wasteful number, since it uses less digits than its factorization.

27856668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242 (or 1240 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 27856668 is about 5277.9416442397. The cubic root of 27856668 is about 303.1398672412.

It can be divided in two parts, 2785 and 6668, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 27856668 in words is "twenty-seven million, eight hundred fifty-six thousand, six hundred sixty-eight".