2149739892 has 24 divisors (see below), whose sum is σ = 5573400000. Its totient is φ = 716579928.

The previous prime is 2149739861. The next prime is 2149739897. The reversal of 2149739892 is 2989379412.

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 (2149739897) 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, 9952392 + ... + 9952607.

It is an arithmetic number, because the mean of its divisors is an integer number (232225000).

Almost surely, 2^2149739892 is an apocalyptic number.

It is an amenable number.

2149739892 is an abundant number, since it is smaller than the sum of its proper divisors (3423660108).

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

2149739892 is a wasteful number, since it uses less digits than its factorization.

2149739892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19905012 (or 19905004 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 2149739892 is about 46365.2875759441. The cubic root of 2149739892 is about 1290.6108302431.

The spelling of 2149739892 in words is "two billion, one hundred forty-nine million, seven hundred thirty-nine thousand, eight hundred ninety-two".