2139877872 has 80 divisors (see below), whose sum is σ = 6700642560. Its totient is φ = 648446400.

The previous prime is 2139877867. The next prime is 2139877877. The reversal of 2139877872 is 2787789312.

It is an interprime number because it is at equal distance from previous prime (2139877867) and next prime (2139877877).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139877877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220404 + ... + 229907.

It is an arithmetic number, because the mean of its divisors is an integer number (83758032).

Almost surely, 2^2139877872 is an apocalyptic number.

2139877872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2139877872 is an abundant number, since it is smaller than the sum of its proper divisors (4560764688).

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

2139877872 is a wasteful number, since it uses less digits than its factorization.

2139877872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450339 (or 450327 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 2139877872 is about 46258.8139925788. The cubic root of 2139877872 is about 1288.6342278522.

It can be divided in two parts, 21 and 39877872, that added together give a palindrome (39877893).

The spelling of 2139877872 in words is "two billion, one hundred thirty-nine million, eight hundred seventy-seven thousand, eight hundred seventy-two".