2139889920 has 144 divisors (see below), whose sum is σ = 7810696320. Its totient is φ = 489111552.

The previous prime is 2139889919. The next prime is 2139889933. The reversal of 2139889920 is 299889312.

2139889920 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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, 12925 + ... + 66684.

Almost surely, 2^2139889920 is an apocalyptic number.

2139889920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139889920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3905348160).

2139889920 is an abundant number, since it is smaller than the sum of its proper divisors (5670806400).

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

2139889920 is an equidigital number, since it uses as much as digits as its factorization.

2139889920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79640 (or 79626 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 2139889920 is about 46258.9442162270. The cubic root of 2139889920 is about 1288.6366462825.

The spelling of 2139889920 in words is "two billion, one hundred thirty-nine million, eight hundred eighty-nine thousand, nine hundred twenty".