850801638 has 8 divisors (see below), whose sum is σ = 1701603288. Its totient is φ = 283600544.

The previous prime is 850801621. The next prime is 850801649. The reversal of 850801638 is 836108058.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

850801638 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 850801596 and 850801605.

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 3 ways as a sum of consecutive naturals, for example, 70900131 + ... + 70900142.

It is an arithmetic number, because the mean of its divisors is an integer number (212700411).

Almost surely, 2^850801638 is an apocalyptic number.

850801638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

850801638 is a wasteful number, since it uses less digits than its factorization.

850801638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141800278.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 850801638 is about 29168.5042125920. The cubic root of 850801638 is about 947.5659342917.

The spelling of 850801638 in words is "eight hundred fifty million, eight hundred one thousand, six hundred thirty-eight".