520650 has 72 divisors (see below), whose sum is σ = 1523340. Its totient is φ = 126720.

The previous prime is 520649. The next prime is 520679. The reversal of 520650 is 56025.

520650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 40401 + 480249 = 201^2 + 693^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5806 + ... + 5894.

2⁵²⁰⁶⁵⁰ is an apocalyptic number.

520650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 520650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761670).

520650 is an abundant number, since it is smaller than the sum of its proper divisors (1002690).

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

520650 is a wasteful number, since it uses less digits than its factorization.

520650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 520650 is about 721.5608082483. The cubic root of 520650 is about 80.4480072686.

Adding to 520650 its reverse (56025), we get a palindrome (576675).

The spelling of 520650 in words is "five hundred twenty thousand, six hundred fifty".