520857634 has 8 divisors (see below), whose sum is σ = 852312528. Its totient is φ = 236753460.

The previous prime is 520857599. The next prime is 520857647. The reversal of 520857634 is 436758025.

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

It is an unprimeable number.

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, 11837652 + ... + 11837695.

It is an arithmetic number, because the mean of its divisors is an integer number (106539066).

Almost surely, 2^520857634 is an apocalyptic number.

520857634 is a deficient number, since it is larger than the sum of its proper divisors (331454894).

520857634 is a wasteful number, since it uses less digits than its factorization.

520857634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23675360.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 520857634 is about 22822.3056241038. The cubic root of 520857634 is about 804.5870000625.

The spelling of 520857634 in words is "five hundred twenty million, eight hundred fifty-seven thousand, six hundred thirty-four".