2139377920 has 72 divisors (see below), whose sum is σ = 5425973784. Its totient is φ = 805404672.

The previous prime is 2139377887. The next prime is 2139377923. The reversal of 2139377920 is 297739312.

It can be written as a sum of positive squares in 4 ways, for example, as 504631296 + 1634746624 = 22464^2 + 40432^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2139377923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27399 + ... + 70918.

It is an arithmetic number, because the mean of its divisors is an integer number (75360747).

Almost surely, 2^2139377920 is an apocalyptic number.

2139377920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2139377920 is an abundant number, since it is smaller than the sum of its proper divisors (3286595864).

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

2139377920 is an equidigital number, since it uses as much as digits as its factorization.

2139377920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98355 (or 98341 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 2139377920 is about 46253.4098202500. The cubic root of 2139377920 is about 1288.5338630218.

The spelling of 2139377920 in words is "two billion, one hundred thirty-nine million, three hundred seventy-seven thousand, nine hundred twenty".