867828 has 24 divisors (see below), whose sum is σ = 2181088. Its totient is φ = 266976.

The previous prime is 867827. The next prime is 867829. The reversal of 867828 is 828768.

It is an interprime number because it is at equal distance from previous prime (867827) and next prime (867829).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2626 + ... + 2937.

2⁸⁶⁷⁸²⁸ is an apocalyptic number.

It is an amenable number.

867828 is an abundant number, since it is smaller than the sum of its proper divisors (1313260).

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

867828 is a wasteful number, since it uses less digits than its factorization.

867828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5583 (or 5581 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 867828 is about 931.5728634949. The cubic root of 867828 is about 95.3845172629.

Subtracting from 867828 its reverse (828768), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 867828 in words is "eight hundred sixty-seven thousand, eight hundred twenty-eight".