12638395 has 32 divisors (see below), whose sum is σ = 20030976. Its totient is φ = 7411200.

The previous prime is 12638389. The next prime is 12638399. The reversal of 12638395 is 59383621.

12638395 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12638395 - 2⁹ = 12637883 is a prime.

12638395 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12638399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5580 + ... + 7510.

It is an arithmetic number, because the mean of its divisors is an integer number (625968).

Almost surely, 2^12638395 is an apocalyptic number.

12638395 is a deficient number, since it is larger than the sum of its proper divisors (7392581).

12638395 is a wasteful number, since it uses less digits than its factorization.

12638395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971.

The product of its digits is 38880, while the sum is 37.

The square root of 12638395 is about 3555.0520390003. The cubic root of 12638395 is about 232.9327969659.

The spelling of 12638395 in words is "twelve million, six hundred thirty-eight thousand, three hundred ninety-five".