859984 has 20 divisors (see below), whose sum is σ = 1696320. Its totient is φ = 422240.

The previous prime is 859981. The next prime is 859987. The reversal of 859984 is 489958.

859984 = 43² + 44² + ... + 138².

It is a happy number.

859984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (859981) and next prime (859987).

It is a self number, because there is not a number n which added to its sum of digits gives 859984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859981) 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, 489 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (84816).

2⁸⁵⁹⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

859984 is a deficient number, since it is larger than the sum of its proper divisors (836336).

859984 is a wasteful number, since it uses less digits than its factorization.

859984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978 (or 972 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 859984 is about 927.3532228876. The cubic root of 859984 is about 95.0962643790.

The spelling of 859984 in words is "eight hundred fifty-nine thousand, nine hundred eighty-four".