520493394 has 8 divisors (see below), whose sum is σ = 1040986800. Its totient is φ = 173497796.

The previous prime is 520493387. The next prime is 520493399. The reversal of 520493394 is 493394025.

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

520493394 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (520493399) 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 3 ways as a sum of consecutive naturals, for example, 43374444 + ... + 43374455.

It is an arithmetic number, because the mean of its divisors is an integer number (130123350).

Almost surely, 2^520493394 is an apocalyptic number.

520493394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

520493394 is a wasteful number, since it uses less digits than its factorization.

520493394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86748904.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 520493394 is about 22814.3243160958. The cubic root of 520493394 is about 804.3994049053.

The spelling of 520493394 in words is "five hundred twenty million, four hundred ninety-three thousand, three hundred ninety-four".