12704638 has 8 divisors (see below), whose sum is σ = 19242288. Its totient is φ = 6290544.

The previous prime is 12704633. The next prime is 12704641. The reversal of 12704638 is 83640721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12704638² = 322815653422088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12704633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30631 + ... + 31042.

It is an arithmetic number, because the mean of its divisors is an integer number (2405286).

Almost surely, 2^12704638 is an apocalyptic number.

12704638 is a deficient number, since it is larger than the sum of its proper divisors (6537650).

12704638 is a wasteful number, since it uses less digits than its factorization.

12704638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61778.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 12704638 is about 3564.3566039329. The cubic root of 12704638 is about 233.3390533745.

The spelling of 12704638 in words is "twelve million, seven hundred four thousand, six hundred thirty-eight".