520678 has 4 divisors (see below), whose sum is σ = 781020. Its totient is φ = 260338.

The previous prime is 520649. The next prime is 520679. The reversal of 520678 is 876025.

520678 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×520678² = 542211159368, which contains 22 as substring.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520679) by changing a digit.

520678 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 as a sum of consecutive naturals, namely, 130168 + ... + 130171.

It is an arithmetic number, because the mean of its divisors is an integer number (195255).

2⁵²⁰⁶⁷⁸ is an apocalyptic number.

520678 is a deficient number, since it is larger than the sum of its proper divisors (260342).

520678 is a wasteful number, since it uses less digits than its factorization.

520678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260341.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 520678 is about 721.5802103717. The cubic root of 520678 is about 80.4494493787.

The spelling of 520678 in words is "five hundred twenty thousand, six hundred seventy-eight".