638112004 has 12 divisors (see below), whose sum is σ = 1125221328. Its totient is φ = 316620200.

The previous prime is 638111989. The next prime is 638112043. The reversal of 638112004 is 400211836.

It is a self number, because there is not a number n which added to its sum of digits gives 638112004.

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, 608362 + ... + 609409.

It is an arithmetic number, because the mean of its divisors is an integer number (93768444).

Almost surely, 2^638112004 is an apocalyptic number.

It is an amenable number.

638112004 is a deficient number, since it is larger than the sum of its proper divisors (487109324).

638112004 is a wasteful number, since it uses less digits than its factorization.

638112004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217906 (or 1217904 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 638112004 is about 25260.8789237429. The cubic root of 638112004 is about 860.9256321778.

The spelling of 638112004 in words is "six hundred thirty-eight million, one hundred twelve thousand, four".