520203660 has 96 divisors (see below), whose sum is σ = 1538019840. Its totient is φ = 131010048.

The previous prime is 520203623. The next prime is 520203667. The reversal of 520203660 is 66302025.

It is a super-2 number, since 2×520203660² = 541223695754791200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 520203660.

It is not an unprimeable number, because it can be changed into a prime (520203667) 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, 554712 + ... + 555648.

It is an arithmetic number, because the mean of its divisors is an integer number (16021040).

Almost surely, 2^520203660 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 520203660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769009920).

520203660 is an abundant number, since it is smaller than the sum of its proper divisors (1017816180).

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

520203660 is a wasteful number, since it uses less digits than its factorization.

520203660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455 (or 1453 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 520203660 is about 22807.9736057371. The cubic root of 520203660 is about 804.2501201957.

Adding to 520203660 its reverse (66302025), we get a palindrome (586505685).

The spelling of 520203660 in words is "five hundred twenty million, two hundred three thousand, six hundred sixty".