856834388 has 6 divisors (see below), whose sum is σ = 1499460186. Its totient is φ = 428417192.

The previous prime is 856834379. The next prime is 856834399. The reversal of 856834388 is 883438658.

It can be written as a sum of positive squares in only one way, i.e., 587480644 + 269353744 = 24238^2 + 16412^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 107104295 + ... + 107104302.

It is an arithmetic number, because the mean of its divisors is an integer number (249910031).

Almost surely, 2^856834388 is an apocalyptic number.

It is an amenable number.

856834388 is a deficient number, since it is larger than the sum of its proper divisors (642625798).

856834388 is a wasteful number, since it uses less digits than its factorization.

856834388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214208601 (or 214208599 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 53.

The square root of 856834388 is about 29271.7336008648. The cubic root of 856834388 is about 949.8002859959.

The spelling of 856834388 in words is "eight hundred fifty-six million, eight hundred thirty-four thousand, three hundred eighty-eight".