856438196 has 6 divisors (see below), whose sum is σ = 1498766850. Its totient is φ = 428219096.

The previous prime is 856438171. The next prime is 856438201. The reversal of 856438196 is 691834658.

It can be written as a sum of positive squares in only one way, i.e., 503374096 + 353064100 = 22436^2 + 18790^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107054771 + ... + 107054778.

It is an arithmetic number, because the mean of its divisors is an integer number (249794475).

Almost surely, 2^856438196 is an apocalyptic number.

It is an amenable number.

856438196 is a deficient number, since it is larger than the sum of its proper divisors (642328654).

856438196 is a wasteful number, since it uses less digits than its factorization.

856438196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214109553 (or 214109551 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 856438196 is about 29264.9653339962. The cubic root of 856438196 is about 949.6538705801.

It can be divided in two parts, 85643 and 8196, that added together give a palindrome (93839).

The spelling of 856438196 in words is "eight hundred fifty-six million, four hundred thirty-eight thousand, one hundred ninety-six".