13438645 has 8 divisors (see below), whose sum is σ = 17592480. Its totient is φ = 9773520.

The previous prime is 13438639. The next prime is 13438673. The reversal of 13438645 is 54683431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13438645 - 2³ = 13438637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13438645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122115 + ... + 122224.

It is an arithmetic number, because the mean of its divisors is an integer number (2199060).

Almost surely, 2^13438645 is an apocalyptic number.

It is an amenable number.

13438645 is a deficient number, since it is larger than the sum of its proper divisors (4153835).

13438645 is a wasteful number, since it uses less digits than its factorization.

13438645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244355.

The product of its digits is 34560, while the sum is 34.

The square root of 13438645 is about 3665.8757480307. The cubic root of 13438645 is about 237.7488877485.

It can be divided in two parts, 134386 and 45, that added together give a palindrome (134431).

The spelling of 13438645 in words is "thirteen million, four hundred thirty-eight thousand, six hundred forty-five".