858228 has 48 divisors (see below), whose sum is σ = 2427264. Its totient is φ = 230400.

The previous prime is 858223. The next prime is 858233. The reversal of 858228 is 822858.

It is an interprime number because it is at equal distance from previous prime (858223) and next prime (858233).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1128 + ... + 1728.

It is an arithmetic number, because the mean of its divisors is an integer number (50568).

2⁸⁵⁸²²⁸ 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 858228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213632).

858228 is an abundant number, since it is smaller than the sum of its proper divisors (1569036).

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

858228 is a wasteful number, since it uses less digits than its factorization.

858228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 630 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 858228 is about 926.4059585301. The cubic root of 858228 is about 95.0314946362.

The spelling of 858228 in words is "eight hundred fifty-eight thousand, two hundred twenty-eight".