857870872 has 16 divisors (see below), whose sum is σ = 1608838560. Its totient is φ = 428847264.

The previous prime is 857870851. The next prime is 857870873. The reversal of 857870872 is 278078758.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857870873) 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, 50578 + ... + 65374.

It is an arithmetic number, because the mean of its divisors is an integer number (100552410).

Almost surely, 2^857870872 is an apocalyptic number.

It is an amenable number.

857870872 is a deficient number, since it is larger than the sum of its proper divisors (750967688).

857870872 is a wasteful number, since it uses less digits than its factorization.

857870872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22050 (or 22046 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 52.

The square root of 857870872 is about 29289.4327701989. The cubic root of 857870872 is about 950.1831122560.

The spelling of 857870872 in words is "eight hundred fifty-seven million, eight hundred seventy thousand, eight hundred seventy-two".