857264158 has 4 divisors (see below), whose sum is σ = 1285896240. Its totient is φ = 428632078.

The previous prime is 857264143. The next prime is 857264179. The reversal of 857264158 is 851462758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 851462758 = 2 ⋅425731379.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 214316038 + ... + 214316041.

It is an arithmetic number, because the mean of its divisors is an integer number (321474060).

Almost surely, 2^857264158 is an apocalyptic number.

857264158 is a deficient number, since it is larger than the sum of its proper divisors (428632082).

857264158 is a wasteful number, since it uses less digits than its factorization.

857264158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428632081.

The product of its digits is 537600, while the sum is 46.

The square root of 857264158 is about 29279.0737216873. The cubic root of 857264158 is about 949.9590593622.

The spelling of 857264158 in words is "eight hundred fifty-seven million, two hundred sixty-four thousand, one hundred fifty-eight".