857253768 has 64 divisors (see below), whose sum is σ = 2451624960. Its totient is φ = 244696896.

The previous prime is 857253767. The next prime is 857253809. The reversal of 857253768 is 867352758.

It is a self number, because there is not a number n which added to its sum of digits gives 857253768.

It is not an unprimeable number, because it can be changed into a prime (857253767) 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 15 ways as a sum of consecutive naturals, for example, 257571 + ... + 260877.

It is an arithmetic number, because the mean of its divisors is an integer number (38306640).

Almost surely, 2^857253768 is an apocalyptic number.

It is an amenable number.

857253768 is an abundant number, since it is smaller than the sum of its proper divisors (1594371192).

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

857253768 is a wasteful number, since it uses less digits than its factorization.

857253768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4866 (or 4862 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 51.

The square root of 857253768 is about 29278.8962906733. The cubic root of 857253768 is about 949.9552215274.

The spelling of 857253768 in words is "eight hundred fifty-seven million, two hundred fifty-three thousand, seven hundred sixty-eight".