857402768 has 20 divisors (see below), whose sum is σ = 1664305308. Its totient is φ = 427904640.

The previous prime is 857402761. The next prime is 857402779. The reversal of 857402768 is 867204758.

857402768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 107081104 + 750321664 = 10348^2 + 27392^2 .

It is not an unprimeable number, because it can be changed into a prime (857402761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40871 + ... + 58182.

Almost surely, 2^857402768 is an apocalyptic number.

It is an amenable number.

857402768 is a deficient number, since it is larger than the sum of its proper divisors (806902540).

857402768 is a wasteful number, since it uses less digits than its factorization.

857402768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99602 (or 99596 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 857402768 is about 29281.4406749395. The cubic root of 857402768 is about 950.0102558450.

The spelling of 857402768 in words is "eight hundred fifty-seven million, four hundred two thousand, seven hundred sixty-eight".