13825866 has 32 divisors (see below), whose sum is σ = 28828800. Its totient is φ = 4415040.

The previous prime is 13825853. The next prime is 13825873. The reversal of 13825866 is 66852831.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31275 + ... + 31713.

It is an arithmetic number, because the mean of its divisors is an integer number (900900).

Almost surely, 2^13825866 is an apocalyptic number.

13825866 is an abundant number, since it is smaller than the sum of its proper divisors (15002934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13825866 is a wasteful number, since it uses less digits than its factorization.

13825866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654.

The product of its digits is 69120, while the sum is 39.

The square root of 13825866 is about 3718.3149409376. The cubic root of 13825866 is about 240.0107981253.

The spelling of 13825866 in words is "thirteen million, eight hundred twenty-five thousand, eight hundred sixty-six".