859199988 has 48 divisors (see below), whose sum is σ = 2118312000. Its totient is φ = 270298368.

The previous prime is 859199987. The next prime is 859199989. The reversal of 859199988 is 889991958.

It is an interprime number because it is at equal distance from previous prime (859199987) and next prime (859199989).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859199987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54328 + ... + 68336.

It is an arithmetic number, because the mean of its divisors is an integer number (44131500).

Almost surely, 2^859199988 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 859199988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059156000).

859199988 is an abundant number, since it is smaller than the sum of its proper divisors (1259112012).

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

859199988 is a wasteful number, since it uses less digits than its factorization.

859199988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14304 (or 14302 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 66.

The square root of 859199988 is about 29312.1133322045. The cubic root of 859199988 is about 950.6735714326.

The spelling of 859199988 in words is "eight hundred fifty-nine million, one hundred ninety-nine thousand, nine hundred eighty-eight".