2139810890 has 24 divisors (see below), whose sum is σ = 4480503012. Its totient is φ = 733649280.

The previous prime is 2139810853. The next prime is 2139810901. The reversal of 2139810890 is 980189312.

It can be written as a sum of positive squares in 2 ways, for example, as 2138970001 + 840889 = 46249^2 + 917^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2182991 + ... + 2183970.

Almost surely, 2^2139810890 is an apocalyptic number.

2139810890 is an abundant number, since it is smaller than the sum of its proper divisors (2340692122).

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

2139810890 is a wasteful number, since it uses less digits than its factorization.

2139810890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366982 (or 4366975 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 2139810890 is about 46258.0899951565. The cubic root of 2139810890 is about 1288.6207821942.

The spelling of 2139810890 in words is "two billion, one hundred thirty-nine million, eight hundred ten thousand, eight hundred ninety".