800785138 has 8 divisors (see below), whose sum is σ = 1201545180. Its totient is φ = 400270080.

The previous prime is 800785123. The next prime is 800785151. The reversal of 800785138 is 831587008.

It can be written as a sum of positive squares in 2 ways, for example, as 771006289 + 29778849 = 27767^2 + 5457^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 800785138.

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, 52843 + ... + 66286.

Almost surely, 2^800785138 is an apocalyptic number.

800785138 is a deficient number, since it is larger than the sum of its proper divisors (400760042).

800785138 is a wasteful number, since it uses less digits than its factorization.

800785138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122492.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 800785138 is about 28298.1472538398. The cubic root of 800785138 is about 928.6213580749.

The spelling of 800785138 in words is "eight hundred million, seven hundred eighty-five thousand, one hundred thirty-eight".