2780876985 has 32 divisors (see below), whose sum is σ = 4671433728. Its totient is φ = 1409918400.

The previous prime is 2780876897. The next prime is 2780877007. The reversal of 2780876985 is 5896780872.

It is not a de Polignac number, because 2780876985 - 2¹⁰ = 2780875961 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31510 + ... + 80960.

It is an arithmetic number, because the mean of its divisors is an integer number (145982304).

Almost surely, 2^2780876985 is an apocalyptic number.

It is an amenable number.

2780876985 is a deficient number, since it is larger than the sum of its proper divisors (1890556743).

2780876985 is a wasteful number, since it uses less digits than its factorization.

2780876985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49645.

The product of its (nonzero) digits is 13547520, while the sum is 60.

The square root of 2780876985 is about 52734.0211343683. The cubic root of 2780876985 is about 1406.2437090484.

The spelling of 2780876985 in words is "two billion, seven hundred eighty million, eight hundred seventy-six thousand, nine hundred eighty-five".