520428 has 24 divisors (see below), whose sum is σ = 1254400. Its totient is φ = 167760.

The previous prime is 520427. The next prime is 520433. The reversal of 520428 is 824025.

It is not an unprimeable number, because it can be changed into a prime (520423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328 + ... + 1071.

2⁵²⁰⁴²⁸ is an apocalyptic number.

It is an amenable number.

520428 is an abundant number, since it is smaller than the sum of its proper divisors (733972).

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

520428 is a wasteful number, since it uses less digits than its factorization.

520428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 520428 is about 721.4069586579. The cubic root of 520428 is about 80.4365715654.

The spelling of 520428 in words is "five hundred twenty thousand, four hundred twenty-eight".