859199994 has 64 divisors (see below), whose sum is σ = 1984694400. Its totient is φ = 275192064.

The previous prime is 859199993. The next prime is 859200053. The reversal of 859199994 is 499991958.

It is not an unprimeable number, because it can be changed into a prime (859199993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354274 + ... + 356690.

It is an arithmetic number, because the mean of its divisors is an integer number (31010850).

Almost surely, 2^859199994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 859199994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992347200).

859199994 is an abundant number, since it is smaller than the sum of its proper divisors (1125494406).

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

859199994 is a wasteful number, since it uses less digits than its factorization.

859199994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684 (or 2678 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 63.

The square root of 859199994 is about 29312.1134345513. The cubic root of 859199994 is about 950.6735736455.

The spelling of 859199994 in words is "eight hundred fifty-nine million, one hundred ninety-nine thousand, nine hundred ninety-four".