2138879000 has 32 divisors (see below), whose sum is σ = 5004979200. Its totient is φ = 855551200.

The previous prime is 2138878999. The next prime is 2138879023. The reversal of 2138879000 is 9788312.

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, 1068440 + ... + 1070439.

It is an arithmetic number, because the mean of its divisors is an integer number (156405600).

Almost surely, 2^2138879000 is an apocalyptic number.

2138879000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2138879000 is an abundant number, since it is smaller than the sum of its proper divisors (2866100200).

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

2138879000 is a wasteful number, since it uses less digits than its factorization.

2138879000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138900 (or 2138886 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 2138879000 is about 46248.0161736695. The cubic root of 2138879000 is about 1288.4336897751.

The spelling of 2138879000 in words is "two billion, one hundred thirty-eight million, eight hundred seventy-nine thousand".