520620750 has 256 divisors, whose sum is σ = 1651104000. Its totient is φ = 120268800.

The previous prime is 520620713. The next prime is 520620769. The reversal of 520620750 is 57026025.

It is a super-3 number, since 3×520620750³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable 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 in 127 ways as a sum of consecutive naturals, for example, 1491576 + ... + 1491924.

It is an arithmetic number, because the mean of its divisors is an integer number (6449625).

Almost surely, 2^520620750 is an apocalyptic number.

520620750 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 520620750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825552000).

520620750 is an abundant number, since it is smaller than the sum of its proper divisors (1130483250).

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

520620750 is a wasteful number, since it uses less digits than its factorization.

520620750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 520620750 is about 22817.1152865563. The cubic root of 520620750 is about 804.4650072340.

Adding to 520620750 its reverse (57026025), we get a palindrome (577646775).

The spelling of 520620750 in words is "five hundred twenty million, six hundred twenty thousand, seven hundred fifty".