638422880288 has 54 divisors (see below), whose sum is σ = 1267365686013. Its totient is φ = 316574076160.

The previous prime is 638422880287. The next prime is 638422880419. The reversal of 638422880288 is 882088224836.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 633507748624 + 4915131664 = 795932^2 + 70108^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=564988.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638422880287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 619226333 + ... + 619227363.

Almost surely, 2^638422880288 is an apocalyptic number.

It is an amenable number.

638422880288 is a deficient number, since it is larger than the sum of its proper divisors (628942805725).

638422880288 is an frugal number, since it uses more digits than its factorization.

638422880288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 18874368, while the sum is 59.

The spelling of 638422880288 in words is "six hundred thirty-eight billion, four hundred twenty-two million, eight hundred eighty thousand, two hundred eighty-eight".