2129558320 has 40 divisors (see below), whose sum is σ = 4977181440. Its totient is φ = 847357440.

The previous prime is 2129558311. The next prime is 2129558357. The reversal of 2129558320 is 238559212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 2129558320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54405 + ... + 84964.

It is an arithmetic number, because the mean of its divisors is an integer number (124429536).

Almost surely, 2^2129558320 is an apocalyptic number.

2129558320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2129558320 is an abundant number, since it is smaller than the sum of its proper divisors (2847623120).

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

2129558320 is a wasteful number, since it uses less digits than its factorization.

2129558320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139573 (or 139567 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 2129558320 is about 46147.1377227234. The cubic root of 2129558320 is about 1286.5594112975.

The spelling of 2129558320 in words is "two billion, one hundred twenty-nine million, five hundred fifty-eight thousand, three hundred twenty".