857208 has 64 divisors (see below), whose sum is σ = 2488320. Its totient is φ = 243200.

The previous prime is 857203. The next prime is 857221. The reversal of 857208 is 802758.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857201) by changing a digit.

857208 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4393 + ... + 4583.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2⁸⁵⁷²⁰⁸ is an apocalyptic number.

857208 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244160).

857208 is an abundant number, since it is smaller than the sum of its proper divisors (1631112).

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

857208 is a wasteful number, since it uses less digits than its factorization.

857208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 857208 is about 925.8552802679. The cubic root of 857208 is about 94.9938315478.

The spelling of 857208 in words is "eight hundred fifty-seven thousand, two hundred eight".