850001688 has 80 divisors (see below), whose sum is σ = 2405513880. Its totient is φ = 280392192.

The previous prime is 850001671. The next prime is 850001693. The reversal of 850001688 is 886100058.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 56095 + ... + 69617.

Almost surely, 2^850001688 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 850001688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202756940).

850001688 is an abundant number, since it is smaller than the sum of its proper divisors (1555512192).

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

850001688 is a wasteful number, since it uses less digits than its factorization.

850001688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13638 (or 13625 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 850001688 is about 29154.7884231733. The cubic root of 850001688 is about 947.2688642399.

The spelling of 850001688 in words is "eight hundred fifty million, one thousand, six hundred eighty-eight".