638823846234 has 32 divisors (see below), whose sum is σ = 1460195942400. Its totient is φ = 182517705072.

The previous prime is 638823846233. The next prime is 638823846247. The reversal of 638823846234 is 432648328836.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (638823846233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2928067 + ... + 3138665.

It is an arithmetic number, because the mean of its divisors is an integer number (45631123200).

Almost surely, 2^638823846234 is an apocalyptic number.

638823846234 is an abundant number, since it is smaller than the sum of its proper divisors (821372096166).

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

638823846234 is a wasteful number, since it uses less digits than its factorization.

638823846234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282834.

The product of its digits is 31850496, while the sum is 57.

The spelling of 638823846234 in words is "six hundred thirty-eight billion, eight hundred twenty-three million, eight hundred forty-six thousand, two hundred thirty-four".