858396 has 48 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 222720.

The previous prime is 858373. The next prime is 858397. The reversal of 858396 is 693858.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 858396.

It is not an unprimeable number, because it can be changed into a prime (858397) by changing a digit.

858396 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, 460 + ... + 1388.

It is an arithmetic number, because the mean of its divisors is an integer number (52080).

2⁸⁵⁸³⁹⁶ 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 858396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249920).

858396 is an abundant number, since it is smaller than the sum of its proper divisors (1641444).

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

858396 is a wasteful number, since it uses less digits than its factorization.

858396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 952 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 858396 is about 926.4966270851. The cubic root of 858396 is about 95.0376951056.

The spelling of 858396 in words is "eight hundred fifty-eight thousand, three hundred ninety-six".