857153868 has 12 divisors (see below), whose sum is σ = 2000025720. Its totient is φ = 285717952.

The previous prime is 857153867. The next prime is 857153879. The reversal of 857153868 is 868351758.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×857153868² = 1469425506854722848, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 857153868.

It is not an unprimeable number, because it can be changed into a prime (857153867) 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, 35714733 + ... + 35714756.

It is an arithmetic number, because the mean of its divisors is an integer number (166668810).

Almost surely, 2^857153868 is an apocalyptic number.

It is an amenable number.

857153868 is an abundant number, since it is smaller than the sum of its proper divisors (1142871852).

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

857153868 is a wasteful number, since it uses less digits than its factorization.

857153868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71429496 (or 71429494 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 51.

The square root of 857153868 is about 29277.1902340371. The cubic root of 857153868 is about 949.9183191084.

The spelling of 857153868 in words is "eight hundred fifty-seven million, one hundred fifty-three thousand, eight hundred sixty-eight".