520743680 has 72 divisors (see below), whose sum is σ = 1252988352. Its totient is φ = 207355904.

The previous prime is 520743653. The next prime is 520743689. The reversal of 520743680 is 86347025.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 520743680.

It is not an unprimeable number, because it can be changed into a prime (520743689) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 328169 + ... + 329751.

It is an arithmetic number, because the mean of its divisors is an integer number (17402616).

Almost surely, 2^520743680 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 520743680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626494176).

520743680 is an abundant number, since it is smaller than the sum of its proper divisors (732244672).

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

520743680 is a wasteful number, since it uses less digits than its factorization.

520743680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 520743680 is about 22819.8089387269. The cubic root of 520743680 is about 804.5283195400.

The spelling of 520743680 in words is "five hundred twenty million, seven hundred forty-three thousand, six hundred eighty".