831646138 has 16 divisors (see below), whose sum is σ = 1256096160. Its totient is φ = 412955536.

The previous prime is 831646111. The next prime is 831646163.

It is a happy number.

831646138 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 831646138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258045 + ... + 261247.

It is an arithmetic number, because the mean of its divisors is an integer number (78506010).

Almost surely, 2^831646138 is an apocalyptic number.

831646138 is a deficient number, since it is larger than the sum of its proper divisors (424450022).

831646138 is a wasteful number, since it uses less digits than its factorization.

831646138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061.

The product of its digits is 82944, while the sum is 40.

The square root of 831646138 is about 28838.2755725789. The cubic root of 831646138 is about 940.4005151550.

The spelling of 831646138 in words is "eight hundred thirty-one million, six hundred forty-six thousand, one hundred thirty-eight".