2149921872 has 160 divisors (see below), whose sum is σ = 7359528960. Its totient is φ = 587537280.

The previous prime is 2149921853. The next prime is 2149921897. The reversal of 2149921872 is 2781299412.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54097 + ... + 85007.

It is an arithmetic number, because the mean of its divisors is an integer number (45997056).

Almost surely, 2^2149921872 is an apocalyptic number.

2149921872 is the 23184-th decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2149921872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3679764480).

2149921872 is an abundant number, since it is smaller than the sum of its proper divisors (5209607088).

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

2149921872 is a wasteful number, since it uses less digits than its factorization.

2149921872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30958 (or 30946 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 2149921872 is about 46367.2499939343. The cubic root of 2149921872 is about 1290.6472468553.

The spelling of 2149921872 in words is "two billion, one hundred forty-nine million, nine hundred twenty-one thousand, eight hundred seventy-two".