878320 has 20 divisors (see below), whose sum is σ = 2042280. Its totient is φ = 351296.

The previous prime is 878309. The next prime is 878359. The reversal of 878320 is 23878.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5410 + ... + 5569.

It is an arithmetic number, because the mean of its divisors is an integer number (102114).

2⁸⁷⁸³²⁰ is an apocalyptic number.

878320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

878320 is an abundant number, since it is smaller than the sum of its proper divisors (1163960).

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

878320 is a wasteful number, since it uses less digits than its factorization.

878320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10992 (or 10986 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 878320 is about 937.1872811770. The cubic root of 878320 is about 95.7673765862.

The spelling of 878320 in words is "eight hundred seventy-eight thousand, three hundred twenty".