520140630 has 64 divisors (see below), whose sum is σ = 1344688128. Its totient is φ = 128388480.

The previous prime is 520140629. The next prime is 520140679. The reversal of 520140630 is 36041025.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 520140597 and 520140606.

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, 9232 + ... + 33548.

It is an arithmetic number, because the mean of its divisors is an integer number (21010752).

Almost surely, 2^520140630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520140630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672344064).

520140630 is an abundant number, since it is smaller than the sum of its proper divisors (824547498).

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

520140630 is a wasteful number, since it uses less digits than its factorization.

520140630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24381.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 520140630 is about 22806.5918102640. The cubic root of 520140630 is about 804.2176368074.

Adding to 520140630 its reverse (36041025), we get a palindrome (556181655).

The spelling of 520140630 in words is "five hundred twenty million, one hundred forty thousand, six hundred thirty".