520717378 has 32 divisors (see below), whose sum is σ = 865188864. Its totient is φ = 233789952.

The previous prime is 520717357. The next prime is 520717381. The reversal of 520717378 is 873717025.

It is a super-2 number, since 2×520717378² = 542293175502389768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 520717378.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474126 + ... + 475222.

It is an arithmetic number, because the mean of its divisors is an integer number (27037152).

Almost surely, 2^520717378 is an apocalyptic number.

520717378 is a deficient number, since it is larger than the sum of its proper divisors (344471486).

520717378 is a wasteful number, since it uses less digits than its factorization.

520717378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746.

The product of its (nonzero) digits is 82320, while the sum is 40.

The square root of 520717378 is about 22819.2326338990. The cubic root of 520717378 is about 804.5147741299.

The spelling of 520717378 in words is "five hundred twenty million, seven hundred seventeen thousand, three hundred seventy-eight".