2139819372 has 72 divisors (see below), whose sum is σ = 5565111552. Its totient is φ = 692755200.

The previous prime is 2139819343. The next prime is 2139819377. The reversal of 2139819372 is 2739189312.

2139819372 is a `hidden beast` number, since 2 + 1 + 398 + 193 + 72 = 666.

It is not an unprimeable number, because it can be changed into a prime (2139819377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1012597 + ... + 1014707.

It is an arithmetic number, because the mean of its divisors is an integer number (77293216).

Almost surely, 2^2139819372 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 2139819372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2782555776).

2139819372 is an abundant number, since it is smaller than the sum of its proper divisors (3425292180).

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

2139819372 is a wasteful number, since it uses less digits than its factorization.

2139819372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919 (or 2914 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 2139819372 is about 46258.1816763262. The cubic root of 2139819372 is about 1288.6224848473.

The spelling of 2139819372 in words is "two billion, one hundred thirty-nine million, eight hundred nineteen thousand, three hundred seventy-two".