12638355 has 16 divisors (see below), whose sum is σ = 20507904. Its totient is φ = 6644960.

The previous prime is 12638333. The next prime is 12638357. The reversal of 12638355 is 55383621.

It is not a de Polignac number, because 12638355 - 2⁸ = 12638099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12638357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4869 + ... + 6998.

It is an arithmetic number, because the mean of its divisors is an integer number (1281744).

Almost surely, 2^12638355 is an apocalyptic number.

12638355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12638355 is a deficient number, since it is larger than the sum of its proper divisors (7869549).

12638355 is a wasteful number, since it uses less digits than its factorization.

12638355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11946.

The product of its digits is 21600, while the sum is 33.

The square root of 12638355 is about 3555.0464131991. The cubic root of 12638355 is about 232.9325512247.

The spelling of 12638355 in words is "twelve million, six hundred thirty-eight thousand, three hundred fifty-five".