27880681808 has 40 divisors (see below), whose sum is σ = 61744292160. Its totient is φ = 11947219200.

The previous prime is 27880681799. The next prime is 27880681831. The reversal of 27880681808 is 80818608872.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 1159508 + ... + 1183308.

It is an arithmetic number, because the mean of its divisors is an integer number (1543607304).

Almost surely, 2^27880681808 is an apocalyptic number.

27880681808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27880681808 is an abundant number, since it is smaller than the sum of its proper divisors (33863610352).

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

27880681808 is a wasteful number, since it uses less digits than its factorization.

27880681808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34275 (or 34269 counting only the distinct ones).

The product of its (nonzero) digits is 2752512, while the sum is 56.

The spelling of 27880681808 in words is "twenty-seven billion, eight hundred eighty million, six hundred eighty-one thousand, eight hundred eight".