520448840 has 64 divisors (see below), whose sum is σ = 1197504000. Its totient is φ = 203523840.

The previous prime is 520448839. The next prime is 520448849. The reversal of 520448840 is 48844025.

It is a self number, because there is not a number n which added to its sum of digits gives 520448840.

It is not an unprimeable number, because it can be changed into a prime (520448849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343685 + ... + 345195.

It is an arithmetic number, because the mean of its divisors is an integer number (18711000).

Almost surely, 2^520448840 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 520448840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598752000).

520448840 is an abundant number, since it is smaller than the sum of its proper divisors (677055160).

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

520448840 is a wasteful number, since it uses less digits than its factorization.

520448840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710 (or 1706 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 35.

The square root of 520448840 is about 22813.3478472582. The cubic root of 520448840 is about 804.3764521748.

The spelling of 520448840 in words is "five hundred twenty million, four hundred forty-eight thousand, eight hundred forty".