2128099500 has 96 divisors (see below), whose sum is σ = 6885627840. Its totient is φ = 567489600.

The previous prime is 2128099459. The next prime is 2128099517. The reversal of 2128099500 is 59908212.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 31 ways as a sum of consecutive naturals, for example, 65319 + ... + 92318.

It is an arithmetic number, because the mean of its divisors is an integer number (71725290).

Almost surely, 2^2128099500 is an apocalyptic number.

2128099500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2128099500 is an abundant number, since it is smaller than the sum of its proper divisors (4757528340).

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

2128099500 is a wasteful number, since it uses less digits than its factorization.

2128099500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157665 (or 157647 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 2128099500 is about 46131.3288341015. The cubic root of 2128099500 is about 1286.2655651798.

The spelling of 2128099500 in words is "two billion, one hundred twenty-eight million, ninety-nine thousand, five hundred".