2138973696 has 160 divisors (see below), whose sum is σ = 6363878400. Its totient is φ = 709355520.

The previous prime is 2138973679. The next prime is 2138973703. The reversal of 2138973696 is 6963798312.

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

It is a congruent number.

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, 4962601 + ... + 4963031.

It is an arithmetic number, because the mean of its divisors is an integer number (39774240).

Almost surely, 2^2138973696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2138973696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3181939200).

2138973696 is an abundant number, since it is smaller than the sum of its proper divisors (4224904704).

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

2138973696 is an equidigital number, since it uses as much as digits as its factorization.

2138973696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 795 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 2138973696 is about 46249.0399467924. The cubic root of 2138973696 is about 1288.4527040526.

The spelling of 2138973696 in words is "two billion, one hundred thirty-eight million, nine hundred seventy-three thousand, six hundred ninety-six".