857159900 has 54 divisors (see below), whose sum is σ = 1881473328. Its totient is φ = 338956800.

The previous prime is 857159887. The next prime is 857159903. The reversal of 857159900 is 9951758.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857159903) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 940445 + ... + 941355.

Almost surely, 2^857159900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857159900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940736664).

857159900 is an abundant number, since it is smaller than the sum of its proper divisors (1024313428).

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

857159900 is a wasteful number, since it uses less digits than its factorization.

857159900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 857159900 is about 29277.2932492059. The cubic root of 857159900 is about 949.9205473718.

The spelling of 857159900 in words is "eight hundred fifty-seven million, one hundred fifty-nine thousand, nine hundred".