27980878386 has 64 divisors (see below), whose sum is σ = 59223859200. Its totient is φ = 8803057536.

The previous prime is 27980878363. The next prime is 27980878397. The reversal of 27980878386 is 68387808972.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 943350 + ... + 972558.

It is an arithmetic number, because the mean of its divisors is an integer number (925372800).

Almost surely, 2^27980878386 is an apocalyptic number.

27980878386 is an abundant number, since it is smaller than the sum of its proper divisors (31242980814).

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

27980878386 is a wasteful number, since it uses less digits than its factorization.

27980878386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29383.

The product of its (nonzero) digits is 65028096, while the sum is 66.

The spelling of 27980878386 in words is "twenty-seven billion, nine hundred eighty million, eight hundred seventy-eight thousand, three hundred eighty-six".