520017680 has 160 divisors (see below), whose sum is σ = 1513736448. Its totient is φ = 161740800.

The previous prime is 520017677. The next prime is 520017683. The reversal of 520017680 is 86710025.

It is an interprime number because it is at equal distance from previous prime (520017677) and next prime (520017683).

It is not an unprimeable number, because it can be changed into a prime (520017683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 443495 + ... + 444665.

Almost surely, 2^520017680 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 520017680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756868224).

520017680 is an abundant number, since it is smaller than the sum of its proper divisors (993718768).

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

520017680 is a wasteful number, since it uses less digits than its factorization.

520017680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265 (or 1259 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 520017680 is about 22803.8961583322. The cubic root of 520017680 is about 804.1542652596.

The spelling of 520017680 in words is "five hundred twenty million, seventeen thousand, six hundred eighty".