2138794890 has 32 divisors (see below), whose sum is σ = 5138997696. Its totient is φ = 569690880.

The previous prime is 2138794799. The next prime is 2138794901. The reversal of 2138794890 is 984978312.

It is a super-2 number, since 2×2138794890² = 9148887162980224200, which contains 22 as substring.

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, 14032 + ... + 66891.

It is an arithmetic number, because the mean of its divisors is an integer number (160593678).

Almost surely, 2^2138794890 is an apocalyptic number.

2138794890 is an abundant number, since it is smaller than the sum of its proper divisors (3000202806).

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

2138794890 is a wasteful number, since it uses less digits than its factorization.

2138794890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81814.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 2138794890 is about 46247.1068284277. The cubic root of 2138794890 is about 1288.4168006199.

The spelling of 2138794890 in words is "two billion, one hundred thirty-eight million, seven hundred ninety-four thousand, eight hundred ninety".