12638235 has 16 divisors (see below), whose sum is σ = 20874240. Its totient is φ = 6522720.

The previous prime is 12638233. The next prime is 12638237. The reversal of 12638235 is 53283621.

12638235 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12638233) and next prime (12638237).

It is not a de Polignac number, because 12638235 - 2¹ = 12638233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12638233) 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, 13125 + ... + 14054.

It is an arithmetic number, because the mean of its divisors is an integer number (1304640).

Almost surely, 2^12638235 is an apocalyptic number.

12638235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12638235 is a deficient number, since it is larger than the sum of its proper divisors (8236005).

12638235 is a wasteful number, since it uses less digits than its factorization.

12638235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27218.

The product of its digits is 8640, while the sum is 30.

The square root of 12638235 is about 3555.0295357423. The cubic root of 12638235 is about 232.9318139981.

The spelling of 12638235 in words is "twelve million, six hundred thirty-eight thousand, two hundred thirty-five".