858132 has 54 divisors (see below), whose sum is σ = 2396394. Its totient is φ = 258720.

The previous prime is 858127. The next prime is 858149. The reversal of 858132 is 231858.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 853776 + 4356 = 924^2 + 66^2 .

It is a super-3 number, since 3×858132³ = 1895760833387027904, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 858096 and 858105.

It is a congruent number.

It is an unprimeable number.

858132 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4258 + ... + 4454.

2⁸⁵⁸¹³² 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 858132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1198197).

858132 is an abundant number, since it is smaller than the sum of its proper divisors (1538262).

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

858132 is a wasteful number, since it uses less digits than its factorization.

858132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 213 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 858132 is about 926.3541439428. The cubic root of 858132 is about 95.0279511474.

It can be divided in two parts, 858 and 132, that added together give a triangular number (990 = T₄₄).

The spelling of 858132 in words is "eight hundred fifty-eight thousand, one hundred thirty-two".