520440228 has 240 divisors, whose sum is σ = 1771951104. Its totient is φ = 129159360.

The previous prime is 520440181. The next prime is 520440233. The reversal of 520440228 is 822044025.

It is a happy number.

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 79 ways as a sum of consecutive naturals, for example, 573351 + ... + 574257.

Almost surely, 2^520440228 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 520440228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885975552).

520440228 is an abundant number, since it is smaller than the sum of its proper divisors (1251510876).

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

520440228 is a wasteful number, since it uses less digits than its factorization.

520440228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 520440228 is about 22813.1590973280. The cubic root of 520440228 is about 804.3720154094.

The spelling of 520440228 in words is "five hundred twenty million, four hundred forty thousand, two hundred twenty-eight".