878815 has 24 divisors (see below), whose sum is σ = 1305072. Its totient is φ = 564480.

The previous prime is 878797. The next prime is 878821. The reversal of 878815 is 518878.

It is not a de Polignac number, because 878815 - 2⁵ = 878783 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 4060 + ... + 4270.

It is an arithmetic number, because the mean of its divisors is an integer number (54378).

2⁸⁷⁸⁸¹⁵ is an apocalyptic number.

878815 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

878815 is a deficient number, since it is larger than the sum of its proper divisors (426257).

878815 is a wasteful number, since it uses less digits than its factorization.

878815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 240 counting only the distinct ones).

The product of its digits is 17920, while the sum is 37.

The square root of 878815 is about 937.4513320701. The cubic root of 878815 is about 95.7853639366.

The spelling of 878815 in words is "eight hundred seventy-eight thousand, eight hundred fifteen".