1975806872 has 16 divisors (see below), whose sum is σ = 3989610240. Its totient is φ = 911910816.

The previous prime is 1975806869. The next prime is 1975806923. The reversal of 1975806872 is 2786085791.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9498968 + ... + 9499175.

It is an arithmetic number, because the mean of its divisors is an integer number (249350640).

Almost surely, 2^1975806872 is an apocalyptic number.

It is an amenable number.

1975806872 is an abundant number, since it is smaller than the sum of its proper divisors (2013803368).

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

1975806872 is a wasteful number, since it uses less digits than its factorization.

1975806872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18998162 (or 18998158 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 53.

The square root of 1975806872 is about 44450.0491788254. The cubic root of 1975806872 is about 1254.8201880975.

The spelling of 1975806872 in words is "one billion, nine hundred seventy-five million, eight hundred six thousand, eight hundred seventy-two".