13638465 has 24 divisors (see below), whose sum is σ = 23774400. Its totient is φ = 7232544.

The previous prime is 13638463. The next prime is 13638467. The reversal of 13638465 is 56483631.

13638465 is a `hidden beast` number, since 13 + 638 + 4 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (13638463) and next prime (13638467).

It is not a de Polignac number, because 13638465 - 2¹ = 13638463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13638463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8194 + ... + 9716.

It is an arithmetic number, because the mean of its divisors is an integer number (990600).

Almost surely, 2^13638465 is an apocalyptic number.

13638465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13638465 is a deficient number, since it is larger than the sum of its proper divisors (10135935).

13638465 is a wasteful number, since it uses less digits than its factorization.

13638465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733 (or 1730 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 13638465 is about 3693.0292444009. The cubic root of 13638465 is about 238.9214624973.

The spelling of 13638465 in words is "thirteen million, six hundred thirty-eight thousand, four hundred sixty-five".