2139176940 has 96 divisors (see below), whose sum is σ = 6323358720. Its totient is φ = 538845696.

The previous prime is 2139176899. The next prime is 2139176947. The reversal of 2139176940 is 496719312.

It is a junction number, because it is equal to n+sod(n) for n = 2139176892 and 2139176901.

It is not an unprimeable number, because it can be changed into a prime (2139176947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415824 + ... + 420936.

It is an arithmetic number, because the mean of its divisors is an integer number (65868320).

Almost surely, 2^2139176940 is an apocalyptic number.

2139176940 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 2139176940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3161679360).

2139176940 is an abundant number, since it is smaller than the sum of its proper divisors (4184181780).

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

2139176940 is a wasteful number, since it uses less digits than its factorization.

2139176940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5511 (or 5509 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 2139176940 is about 46251.2371726422. The cubic root of 2139176940 is about 1288.4935120949.

The spelling of 2139176940 in words is "two billion, one hundred thirty-nine million, one hundred seventy-six thousand, nine hundred forty".