13438965 has 16 divisors (see below), whose sum is σ = 22196736. Its totient is φ = 6936000.

The previous prime is 13438933. The next prime is 13438967. The reversal of 13438965 is 56983431.

It is not a de Polignac number, because 13438965 - 2⁵ = 13438933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13438967) 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, 13986 + ... + 14915.

It is an arithmetic number, because the mean of its divisors is an integer number (1387296).

Almost surely, 2^13438965 is an apocalyptic number.

13438965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13438965 is a deficient number, since it is larger than the sum of its proper divisors (8757771).

13438965 is a wasteful number, since it uses less digits than its factorization.

13438965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28940.

The product of its digits is 77760, while the sum is 39.

The square root of 13438965 is about 3665.9193935492. The cubic root of 13438965 is about 237.7507748197.

The spelling of 13438965 in words is "thirteen million, four hundred thirty-eight thousand, nine hundred sixty-five".