520107720 has 128 divisors (see below), whose sum is σ = 1708560000. Its totient is φ = 125614080.

The previous prime is 520107703. The next prime is 520107727. The reversal of 520107720 is 27701025.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (520107727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 460116 + ... + 461244.

It is an arithmetic number, because the mean of its divisors is an integer number (13348125).

Almost surely, 2^520107720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520107720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (854280000).

520107720 is an abundant number, since it is smaller than the sum of its proper divisors (1188452280).

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

520107720 is a wasteful number, since it uses less digits than its factorization.

520107720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 520107720 is about 22805.8702969214. The cubic root of 520107720 is about 804.2006751377.

Adding to 520107720 its reverse (27701025), we get a palindrome (547808745).

The spelling of 520107720 in words is "five hundred twenty million, one hundred seven thousand, seven hundred twenty".