8918138878 has 32 divisors (see below), whose sum is σ = 15035903712. Its totient is φ = 3932582400.

The previous prime is 8918138861. The next prime is 8918138941. The reversal of 8918138878 is 8788318198.

It is a Harshad number since it is a multiple of its sum of digits (61).

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, 52450 + ... + 143482.

It is an arithmetic number, because the mean of its divisors is an integer number (469871991).

Almost surely, 2^8918138878 is an apocalyptic number.

8918138878 is a deficient number, since it is larger than the sum of its proper divisors (6117764834).

8918138878 is a wasteful number, since it uses less digits than its factorization.

8918138878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91180.

The product of its digits is 6193152, while the sum is 61.

The square root of 8918138878 is about 94435.8982484945. The cubic root of 8918138878 is about 2073.7580124951.

The spelling of 8918138878 in words is "eight billion, nine hundred eighteen million, one hundred thirty-eight thousand, eight hundred seventy-eight".