2129705802 has 48 divisors (see below), whose sum is σ = 5320261440. Its totient is φ = 603098496.

The previous prime is 2129705789. The next prime is 2129705807. The reversal of 2129705802 is 2085079212.

2129705802 is a `hidden beast` number, since 2 + 1 + 2 + 9 + 70 + 580 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (2129705807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60552 + ... + 89027.

It is an arithmetic number, because the mean of its divisors is an integer number (110838780).

Almost surely, 2^2129705802 is an apocalyptic number.

2129705802 is an abundant number, since it is smaller than the sum of its proper divisors (3190555638).

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

2129705802 is a wasteful number, since it uses less digits than its factorization.

2129705802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149707 (or 149704 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 2129705802 is about 46148.7356489861. The cubic root of 2129705802 is about 1286.5891107229.

The spelling of 2129705802 in words is "two billion, one hundred twenty-nine million, seven hundred five thousand, eight hundred two".