878890831 has 16 divisors (see below), whose sum is σ = 1091833344. Its totient is φ = 688879584.

The previous prime is 878890829. The next prime is 878890841. The reversal of 878890831 is 138098878.

It is a cyclic number.

It is not a de Polignac number, because 878890831 - 2¹ = 878890829 is a prime.

It is a super-2 number, since 2×878890831² = 1544898185631741122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878890811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35395 + ... + 54868.

It is an arithmetic number, because the mean of its divisors is an integer number (68239584).

Almost surely, 2^878890831 is an apocalyptic number.

878890831 is a deficient number, since it is larger than the sum of its proper divisors (212942513).

878890831 is a wasteful number, since it uses less digits than its factorization.

878890831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90390.

The product of its (nonzero) digits is 774144, while the sum is 52.

The square root of 878890831 is about 29646.0930140887. The cubic root of 878890831 is about 957.8811889302.

The spelling of 878890831 in words is "eight hundred seventy-eight million, eight hundred ninety thousand, eight hundred thirty-one".