857128568 has 32 divisors (see below), whose sum is σ = 1640520000. Its totient is φ = 419717760.

The previous prime is 857128567. The next prime is 857128637. The reversal of 857128568 is 865821758.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857128567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112958 + ... + 120306.

It is an arithmetic number, because the mean of its divisors is an integer number (51266250).

Almost surely, 2^857128568 is an apocalyptic number.

It is an amenable number.

857128568 is a deficient number, since it is larger than the sum of its proper divisors (783391432).

857128568 is a wasteful number, since it uses less digits than its factorization.

857128568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655 (or 7651 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 50.

The square root of 857128568 is about 29276.7581538667. The cubic root of 857128568 is about 949.9089729957.

The spelling of 857128568 in words is "eight hundred fifty-seven million, one hundred twenty-eight thousand, five hundred sixty-eight".