520228868 has 6 divisors (see below), whose sum is σ = 910400526. Its totient is φ = 260114432.

The previous prime is 520228861. The next prime is 520228871. The reversal of 520228868 is 868822025.

It can be written as a sum of positive squares in only one way, i.e., 311946244 + 208282624 = 17662^2 + 14432^2 .

It is a super-2 number, since 2×520228868² = 541276150201122848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520228861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65028605 + ... + 65028612.

It is an arithmetic number, because the mean of its divisors is an integer number (151733421).

Almost surely, 2^520228868 is an apocalyptic number.

It is an amenable number.

520228868 is a deficient number, since it is larger than the sum of its proper divisors (390171658).

520228868 is a wasteful number, since it uses less digits than its factorization.

520228868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130057221 (or 130057219 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 520228868 is about 22808.5262128003. The cubic root of 520228868 is about 804.2631107551.

The spelling of 520228868 in words is "five hundred twenty million, two hundred twenty-eight thousand, eight hundred sixty-eight".