857040860 has 24 divisors (see below), whose sum is σ = 1938231456. Its totient is φ = 316445760.

The previous prime is 857040851. The next prime is 857040893. The reversal of 857040860 is 68040758.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 1647896 + ... + 1648415.

It is an arithmetic number, because the mean of its divisors is an integer number (80759644).

Almost surely, 2^857040860 is an apocalyptic number.

It is an amenable number.

857040860 is an abundant number, since it is smaller than the sum of its proper divisors (1081190596).

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

857040860 is a wasteful number, since it uses less digits than its factorization.

857040860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296333 (or 3296331 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 857040860 is about 29275.2602037967. The cubic root of 857040860 is about 949.8765712218.

The spelling of 857040860 in words is "eight hundred fifty-seven million, forty thousand, eight hundred sixty".