10638909 has 12 divisors (see below), whose sum is σ = 15412800. Its totient is φ = 7071624.

The previous prime is 10638907. The next prime is 10638913. The reversal of 10638909 is 90983601.

10638909 is a `hidden beast` number, since 10 + 638 + 9 + 0 + 9 = 666.

10638909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10638909 - 2¹ = 10638907 is a prime.

It is a super-2 number, since 2×10638909² = 226372769420562, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10638907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1852 + ... + 4970.

It is an arithmetic number, because the mean of its divisors is an integer number (1284400).

Almost surely, 2^10638909 is an apocalyptic number.

It is an amenable number.

10638909 is a deficient number, since it is larger than the sum of its proper divisors (4773891).

10638909 is a wasteful number, since it uses less digits than its factorization.

10638909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3504 (or 3501 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 10638909 is about 3261.7340480180. The cubic root of 10638909 is about 219.9373719804.

The spelling of 10638909 in words is "ten million, six hundred thirty-eight thousand, nine hundred nine".