878637881 has 32 divisors (see below), whose sum is σ = 1075507200. Its totient is φ = 708238080.

The previous prime is 878637871. The next prime is 878637887. The reversal of 878637881 is 188736878.

It is a de Polignac number, because none of the positive numbers 2^k-878637881 is a prime.

It is a super-2 number, since 2×878637881² = 1544009051856340322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878637887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223985 + ... + 227873.

It is an arithmetic number, because the mean of its divisors is an integer number (33609600).

Almost surely, 2^878637881 is an apocalyptic number.

It is an amenable number.

878637881 is a deficient number, since it is larger than the sum of its proper divisors (196869319).

878637881 is a wasteful number, since it uses less digits than its factorization.

878637881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989.

The product of its digits is 3612672, while the sum is 56.

The square root of 878637881 is about 29641.8265462842. The cubic root of 878637881 is about 957.7892854815.

The spelling of 878637881 in words is "eight hundred seventy-eight million, six hundred thirty-seven thousand, eight hundred eighty-one".