2891371870 has 16 divisors (see below), whose sum is σ = 5206006080. Its totient is φ = 1156207264.

The previous prime is 2891371853. The next prime is 2891371909. The reversal of 2891371870 is 781731982.

It is a self number, because there is not a number n which added to its sum of digits gives 2891371870.

It is a congruent number.

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, 5590 + ... + 76249.

It is an arithmetic number, because the mean of its divisors is an integer number (325375380).

Almost surely, 2^2891371870 is an apocalyptic number.

2891371870 is a deficient number, since it is larger than the sum of its proper divisors (2314634210).

2891371870 is a wasteful number, since it uses less digits than its factorization.

2891371870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85379.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 2891371870 is about 53771.4782203354. The cubic root of 2891371870 is about 1424.6274795204.

The spelling of 2891371870 in words is "two billion, eight hundred ninety-one million, three hundred seventy-one thousand, eight hundred seventy".