878902491 has 16 divisors (see below), whose sum is σ = 1198522368. Its totient is φ = 572644800.

The previous prime is 878902489. The next prime is 878902523. The reversal of 878902491 is 194209878.

It is not a de Polignac number, because 878902491 - 2¹ = 878902489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 878902491.

It is not an unprimeable number, because it can be changed into a prime (878902411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103206 + ... + 111396.

It is an arithmetic number, because the mean of its divisors is an integer number (74907648).

Almost surely, 2^878902491 is an apocalyptic number.

878902491 is a deficient number, since it is larger than the sum of its proper divisors (319619877).

878902491 is a wasteful number, since it uses less digits than its factorization.

878902491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9002.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 878902491 is about 29646.2896666682. The cubic root of 878902491 is about 957.8854248925.

The spelling of 878902491 in words is "eight hundred seventy-eight million, nine hundred two thousand, four hundred ninety-one".