27880656 has 80 divisors (see below), whose sum is σ = 76328448. Its totient is φ = 8755200.

The previous prime is 27880639. The next prime is 27880667. The reversal of 27880656 is 65608872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60780 + ... + 61236.

Almost surely, 2^27880656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27880656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38164224).

27880656 is an abundant number, since it is smaller than the sum of its proper divisors (48447792).

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

27880656 is a wasteful number, since it uses less digits than its factorization.

27880656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 27880656 is about 5280.2136320418. The cubic root of 27880656 is about 303.2268557838.

The spelling of 27880656 in words is "twenty-seven million, eight hundred eighty thousand, six hundred fifty-six".