27838862778 has 8 divisors (see below), whose sum is σ = 55677725568. Its totient is φ = 9279620924.

The previous prime is 27838862749. The next prime is 27838862813. The reversal of 27838862778 is 87726883872.

It is a sphenic number, since it is the product of 3 distinct primes.

27838862778 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319905226 + ... + 2319905237.

It is an arithmetic number, because the mean of its divisors is an integer number (6959715696).

Almost surely, 2^27838862778 is an apocalyptic number.

27838862778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27838862778 is a wasteful number, since it uses less digits than its factorization.

27838862778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639810468.

The product of its digits is 101154816, while the sum is 66.

The spelling of 27838862778 in words is "twenty-seven billion, eight hundred thirty-eight million, eight hundred sixty-two thousand, seven hundred seventy-eight".