859994844 has 96 divisors (see below), whose sum is σ = 2190888000. Its totient is φ = 261488640.

The previous prime is 859994831. The next prime is 859994857. The reversal of 859994844 is 448499958.

It is an interprime number because it is at equal distance from previous prime (859994831) and next prime (859994857).

It is a super-2 number, since 2×859994844² = 1479182263413168672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1915132 + ... + 1915580.

It is an arithmetic number, because the mean of its divisors is an integer number (22821750).

Almost surely, 2^859994844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 859994844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1095444000).

859994844 is an abundant number, since it is smaller than the sum of its proper divisors (1330893156).

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

859994844 is a wasteful number, since it uses less digits than its factorization.

859994844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743 (or 741 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 60.

The square root of 859994844 is about 29325.6686880282. The cubic root of 859994844 is about 950.9666408393.

The spelling of 859994844 in words is "eight hundred fifty-nine million, nine hundred ninety-four thousand, eight hundred forty-four".