520416720 has 120 divisors (see below), whose sum is σ = 1753610976. Its totient is φ = 138311424.

The previous prime is 520416719. The next prime is 520416749. The reversal of 520416720 is 27614025.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248799 + ... + 250881.

Almost surely, 2^520416720 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 520416720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876805488).

520416720 is an abundant number, since it is smaller than the sum of its proper divisors (1233194256).

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

520416720 is a wasteful number, since it uses less digits than its factorization.

520416720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 520416720 is about 22812.6438625601. The cubic root of 520416720 is about 804.3599042126.

The spelling of 520416720 in words is "five hundred twenty million, four hundred sixteen thousand, seven hundred twenty".