859879944 has 192 divisors, whose sum is σ = 2971837440. Its totient is φ = 218090880.

The previous prime is 859879883. The next prime is 859879949. The reversal of 859879944 is 449978958.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (859879949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 236589 + ... + 240195.

It is an arithmetic number, because the mean of its divisors is an integer number (15478320).

Almost surely, 2^859879944 is an apocalyptic number.

859879944 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 859879944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1485918720).

859879944 is an abundant number, since it is smaller than the sum of its proper divisors (2111957496).

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

859879944 is a wasteful number, since it uses less digits than its factorization.

859879944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680 (or 3673 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The square root of 859879944 is about 29323.7095879768. The cubic root of 859879944 is about 950.9242875104.

The spelling of 859879944 in words is "eight hundred fifty-nine million, eight hundred seventy-nine thousand, nine hundred forty-four".