858140 has 24 divisors (see below), whose sum is σ = 1823472. Its totient is φ = 339200.

The previous prime is 858127. The next prime is 858149. The reversal of 858140 is 41858.

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 858140.

It is not an unprimeable number, because it can be changed into a prime (858149) by changing a digit.

858140 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 7 ways as a sum of consecutive naturals, for example, 1940 + ... + 2340.

It is an arithmetic number, because the mean of its divisors is an integer number (75978).

2⁸⁵⁸¹⁴⁰ is an apocalyptic number.

It is an amenable number.

858140 is an abundant number, since it is smaller than the sum of its proper divisors (965332).

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

858140 is a wasteful number, since it uses less digits than its factorization.

858140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 858140 is about 926.3584619358. The cubic root of 858140 is about 95.0282464483.

Adding to 858140 its reverse (41858), we get a palindrome (899998).

The spelling of 858140 in words is "eight hundred fifty-eight thousand, one hundred forty".