868784 has 20 divisors (see below), whose sum is σ = 1923984. Its totient is φ = 372288.

The previous prime is 868783. The next prime is 868787. The reversal of 868784 is 487868.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868784.

It is not an unprimeable number, because it can be changed into a prime (868783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3767 + ... + 3990.

2⁸⁶⁸⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

868784 is an abundant number, since it is smaller than the sum of its proper divisors (1055200).

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

868784 is a wasteful number, since it uses less digits than its factorization.

868784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7772 (or 7766 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 868784 is about 932.0858329575. The cubic root of 868784 is about 95.4195296290.

The spelling of 868784 in words is "eight hundred sixty-eight thousand, seven hundred eighty-four".