520725750 has 64 divisors (see below), whose sum is σ = 1356286464. Its totient is φ = 132818400.

The previous prime is 520725749. The next prime is 520725787. The reversal of 520725750 is 57527025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2157 + ... + 32343.

It is an arithmetic number, because the mean of its divisors is an integer number (21191976).

Almost surely, 2^520725750 is an apocalyptic number.

520725750 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 520725750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (678143232).

520725750 is an abundant number, since it is smaller than the sum of its proper divisors (835560714).

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

520725750 is a wasteful number, since it uses less digits than its factorization.

520725750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30230 (or 30220 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 33.

The square root of 520725750 is about 22819.4160749130. The cubic root of 520725750 is about 804.5190857213.

The spelling of 520725750 in words is "five hundred twenty million, seven hundred twenty-five thousand, seven hundred fifty".