638050385 has 32 divisors (see below), whose sum is σ = 902383872. Its totient is φ = 423947520.

The previous prime is 638050363. The next prime is 638050393. The reversal of 638050385 is 583050836.

It is not a de Polignac number, because 638050385 - 2¹⁶ = 637984849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365615 + ... + 367355.

It is an arithmetic number, because the mean of its divisors is an integer number (28199496).

Almost surely, 2^638050385 is an apocalyptic number.

It is an amenable number.

638050385 is a deficient number, since it is larger than the sum of its proper divisors (264333487).

638050385 is a wasteful number, since it uses less digits than its factorization.

638050385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 638050385 is about 25259.6592415654. The cubic root of 638050385 is about 860.8979196530.

It can be divided in two parts, 6380 and 50385, that added together give a palindrome (56765).

The spelling of 638050385 in words is "six hundred thirty-eight million, fifty thousand, three hundred eighty-five".