2879985891 has 8 divisors (see below), whose sum is σ = 3850445824. Its totient is φ = 1914758280.

The previous prime is 2879985887. The next prime is 2879985907. The reversal of 2879985891 is 1985899782.

2879985891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2879985891 - 2² = 2879985887 is a prime.

It is the 53666-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2879985881) by changing a digit.

It is a nontrivial repunit in base 53665.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1306795 + ... + 1308996.

It is an arithmetic number, because the mean of its divisors is an integer number (481305728).

Almost surely, 2^2879985891 is an apocalyptic number.

2879985891 is a deficient number, since it is larger than the sum of its proper divisors (970459933).

2879985891 is a wasteful number, since it uses less digits than its factorization.

2879985891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616161.

The product of its digits is 26127360, while the sum is 66.

The square root of 2879985891 is about 53665.5000069877. The cubic root of 2879985891 is about 1422.7549984493.

The spelling of 2879985891 in words is "two billion, eight hundred seventy-nine million, nine hundred eighty-five thousand, eight hundred ninety-one".