863128 has 16 divisors (see below), whose sum is σ = 1849680. Its totient is φ = 369888.

The previous prime is 863123. The next prime is 863131. The reversal of 863128 is 821368.

863128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 863096 and 863105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863123) by changing a digit.

863128 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 3 ways as a sum of consecutive naturals, for example, 7651 + ... + 7762.

It is an arithmetic number, because the mean of its divisors is an integer number (115605).

2⁸⁶³¹²⁸ is an apocalyptic number.

It is an amenable number.

863128 is an abundant number, since it is smaller than the sum of its proper divisors (986552).

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

863128 is a wasteful number, since it uses less digits than its factorization.

863128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15426 (or 15422 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 863128 is about 929.0468233625. The cubic root of 863128 is about 95.2120103483.

It can be divided in two parts, 86312 and 8, that added together give a triangular number (86320 = T₄₁₅).

The spelling of 863128 in words is "eight hundred sixty-three thousand, one hundred twenty-eight".