520406250 has 224 divisors, whose sum is σ = 1627479168. Its totient is φ = 108000000.

The previous prime is 520406233. The next prime is 520406251. The reversal of 520406250 is 52604025.

It is a self number, because there is not a number n which added to its sum of digits gives 520406250.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520406251) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 8531220 + ... + 8531280.

It is an arithmetic number, because the mean of its divisors is an integer number (7265532).

Almost surely, 2^520406250 is an apocalyptic number.

520406250 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 520406250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (813739584).

520406250 is an abundant number, since it is smaller than the sum of its proper divisors (1107072918).

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

520406250 is an equidigital number, since it uses as much as digits as its factorization.

520406250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 520406250 is about 22812.4143834010. The cubic root of 520406250 is about 804.3545100068.

The spelling of 520406250 in words is "five hundred twenty million, four hundred six thousand, two hundred fifty".