859990005 has 96 divisors (see below), whose sum is σ = 1745452800. Its totient is φ = 383616000.

The previous prime is 859989997. The next prime is 859990007. The reversal of 859990005 is 500099958.

It is not a de Polignac number, because 859990005 - 2³ = 859989997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859990007) 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 95 ways as a sum of consecutive naturals, for example, 3426130 + ... + 3426380.

It is an arithmetic number, because the mean of its divisors is an integer number (18181800).

Almost surely, 2^859990005 is an apocalyptic number.

It is an amenable number.

859990005 is an abundant number, since it is smaller than the sum of its proper divisors (885462795).

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

859990005 is a wasteful number, since it uses less digits than its factorization.

859990005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The square root of 859990005 is about 29325.5861833996. The cubic root of 859990005 is about 950.9648572099.

The spelling of 859990005 in words is "eight hundred fifty-nine million, nine hundred ninety thousand, five".