520071720 has 128 divisors (see below), whose sum is σ = 1800714240. Its totient is φ = 117699840.

The previous prime is 520071719. The next prime is 520071733. The reversal of 520071720 is 27170025.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83515 + ... + 89525.

It is an arithmetic number, because the mean of its divisors is an integer number (14068080).

Almost surely, 2^520071720 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 520071720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900357120).

520071720 is an abundant number, since it is smaller than the sum of its proper divisors (1280642520).

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

520071720 is a wasteful number, since it uses less digits than its factorization.

520071720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6135 (or 6131 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 520071720 is about 22805.0810127919. The cubic root of 520071720 is about 804.1821200761.

The spelling of 520071720 in words is "five hundred twenty million, seventy-one thousand, seven hundred twenty".