520878 has 8 divisors (see below), whose sum is σ = 1041768. Its totient is φ = 173624.

The previous prime is 520867. The next prime is 520889. The reversal of 520878 is 878025.

It is an interprime number because it is at equal distance from previous prime (520867) and next prime (520889).

It is a sphenic number, since it is the product of 3 distinct primes.

520878 is an admirable number.

It is a super-4 number, since 4×520878⁴ (a number of 24 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

520878 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 43401 + ... + 43412.

It is an arithmetic number, because the mean of its divisors is an integer number (130221).

2⁵²⁰⁸⁷⁸ is an apocalyptic number.

520878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

520878 is a wasteful number, since it uses less digits than its factorization.

520878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86818.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 520878 is about 721.7187817980. The cubic root of 520878 is about 80.4597486617.

The spelling of 520878 in words is "five hundred twenty thousand, eight hundred seventy-eight".