638828112285 has 32 divisors (see below), whose sum is σ = 1238939372160. Its totient is φ = 309734841600.

The previous prime is 638828112269. The next prime is 638828112287. The reversal of 638828112285 is 582211828836.

638828112285 is a `hidden beast` number, since 6 + 3 + 88 + 281 + 1 + 2 + 285 = 666.

It is not a de Polignac number, because 638828112285 - 2⁴ = 638828112269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638828112287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215092156 + ... + 215095125.

It is an arithmetic number, because the mean of its divisors is an integer number (38716855380).

Almost surely, 2^638828112285 is an apocalyptic number.

It is an amenable number.

638828112285 is a deficient number, since it is larger than the sum of its proper divisors (600111259875).

638828112285 is a wasteful number, since it uses less digits than its factorization.

638828112285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430187306 (or 430187300 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 54.

The spelling of 638828112285 in words is "six hundred thirty-eight billion, eight hundred twenty-eight million, one hundred twelve thousand, two hundred eighty-five".