638119952 has 20 divisors (see below), whose sum is σ = 1236982956. Its totient is φ = 318898560.

The previous prime is 638119907. The next prime is 638120017. The reversal of 638119952 is 259911836.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 579076096 + 59043856 = 24064^2 + 7684^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26558 + ... + 44514.

Almost surely, 2^638119952 is an apocalyptic number.

It is an amenable number.

638119952 is a deficient number, since it is larger than the sum of its proper divisors (598863004).

638119952 is a wasteful number, since it uses less digits than its factorization.

638119952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20186 (or 20180 counting only the distinct ones).

The product of its digits is 116640, while the sum is 44.

The square root of 638119952 is about 25261.0362416113. The cubic root of 638119952 is about 860.9292065808.

The spelling of 638119952 in words is "six hundred thirty-eight million, one hundred nineteen thousand, nine hundred fifty-two".