12638270 has 16 divisors (see below), whose sum is σ = 23738400. Its totient is φ = 4835424.

The previous prime is 12638261. The next prime is 12638273. The reversal of 12638270 is 7283621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27245 + ... + 27704.

It is an arithmetic number, because the mean of its divisors is an integer number (1483650).

Almost surely, 2^12638270 is an apocalyptic number.

12638270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12638270 is a deficient number, since it is larger than the sum of its proper divisors (11100130).

12638270 is a wasteful number, since it uses less digits than its factorization.

12638270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54979.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 12638270 is about 3555.0344583421. The cubic root of 12638270 is about 232.9320290230.

The spelling of 12638270 in words is "twelve million, six hundred thirty-eight thousand, two hundred seventy".