638824102704 has 80 divisors (see below), whose sum is σ = 1835388083200. Its totient is φ = 212740893504.

The previous prime is 638824102703. The next prime is 638824102759. The reversal of 638824102704 is 407201428836.

It is a happy number.

638824102704 is a `hidden beast` number, since 6 + 388 + 241 + 0 + 27 + 0 + 4 = 666.

It is a super-2 number, since 2×638824102704² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 638824102704.

It is not an unprimeable number, because it can be changed into a prime (638824102703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236344 + ... + 1154775.

It is an arithmetic number, because the mean of its divisors is an integer number (22942351040).

Almost surely, 2^638824102704 is an apocalyptic number.

It is an amenable number.

638824102704 is an abundant number, since it is smaller than the sum of its proper divisors (1196563980496).

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

638824102704 is a wasteful number, since it uses less digits than its factorization.

638824102704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392199 (or 1392187 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 638824102704 in words is "six hundred thirty-eight billion, eight hundred twenty-four million, one hundred two thousand, seven hundred four".