2138310990 has 24 divisors (see below), whose sum is σ = 5559608808. Its totient is φ = 570216240.

The previous prime is 2138310961. The next prime is 2138310991. The reversal of 2138310990 is 990138312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138310991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11879416 + ... + 11879595.

It is an arithmetic number, because the mean of its divisors is an integer number (231650367).

Almost surely, 2^2138310990 is an apocalyptic number.

2138310990 is an abundant number, since it is smaller than the sum of its proper divisors (3421297818).

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

2138310990 is a wasteful number, since it uses less digits than its factorization.

2138310990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23759024 (or 23759021 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 2138310990 is about 46241.8748538595. The cubic root of 2138310990 is about 1288.3196256612.

The spelling of 2138310990 in words is "two billion, one hundred thirty-eight million, three hundred ten thousand, nine hundred ninety".