2129992080 has 80 divisors (see below), whose sum is σ = 6614409984. Its totient is φ = 567014400.

The previous prime is 2129992079. The next prime is 2129992091. The reversal of 2129992080 is 802999212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136857 + ... + 151623.

Almost surely, 2^2129992080 is an apocalyptic number.

2129992080 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 2129992080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3307204992).

2129992080 is an abundant number, since it is smaller than the sum of its proper divisors (4484417904).

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

2129992080 is a wasteful number, since it uses less digits than its factorization.

2129992080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15384 (or 15378 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 2129992080 is about 46151.8372332023. The cubic root of 2129992080 is about 1286.6467565027.

The spelling of 2129992080 in words is "two billion, one hundred twenty-nine million, nine hundred ninety-two thousand, eighty".