520497394 has 8 divisors (see below), whose sum is σ = 807668460. Its totient is φ = 251274576.

The previous prime is 520497377. The next prime is 520497427. The reversal of 520497394 is 493794025.

It can be written as a sum of positive squares in 2 ways, for example, as 478078225 + 42419169 = 21865^2 + 6513^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 520497394.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4486989 + ... + 4487104.

Almost surely, 2^520497394 is an apocalyptic number.

520497394 is a deficient number, since it is larger than the sum of its proper divisors (287171066).

520497394 is a wasteful number, since it uses less digits than its factorization.

520497394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8974124.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 520497394 is about 22814.4119801497. The cubic root of 520497394 is about 804.4014655074.

The spelling of 520497394 in words is "five hundred twenty million, four hundred ninety-seven thousand, three hundred ninety-four".