2878865805 has 16 divisors (see below), whose sum is σ = 4608448704. Its totient is φ = 1534640640.

The previous prime is 2878865797. The next prime is 2878865837. The reversal of 2878865805 is 5085688782.

It is not a de Polignac number, because 2878865805 - 2³ = 2878865797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14899 + ... + 77328.

It is an arithmetic number, because the mean of its divisors is an integer number (288028044).

Almost surely, 2^2878865805 is an apocalyptic number.

It is an amenable number.

2878865805 is a deficient number, since it is larger than the sum of its proper divisors (1729582899).

2878865805 is a wasteful number, since it uses less digits than its factorization.

2878865805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94316.

The product of its (nonzero) digits is 8601600, while the sum is 57.

The square root of 2878865805 is about 53655.0631813998. The cubic root of 2878865805 is about 1422.5705282637.

The spelling of 2878865805 in words is "two billion, eight hundred seventy-eight million, eight hundred sixty-five thousand, eight hundred five".