878868 has 18 divisors (see below), whose sum is σ = 2221674. Its totient is φ = 292944.

The previous prime is 878863. The next prime is 878869. The reversal of 878868 is 868878.

It can be written as a sum of positive squares in only one way, i.e., 636804 + 242064 = 798^2 + 492^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×878868² = 1544817922848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12171 + ... + 12242.

2⁸⁷⁸⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

878868 is an abundant number, since it is smaller than the sum of its proper divisors (1342806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

878868 is a wasteful number, since it uses less digits than its factorization.

878868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24423 (or 24418 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 878868 is about 937.4795997780. The cubic root of 878868 is about 95.7872894546.

The spelling of 878868 in words is "eight hundred seventy-eight thousand, eight hundred sixty-eight".