13388815 has 8 divisors (see below), whose sum is σ = 17527248. Its totient is φ = 9737280.

The previous prime is 13388801. The next prime is 13388831. The reversal of 13388815 is 51888331.

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

It is not a de Polignac number, because 13388815 - 2¹¹ = 13386767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121662 + ... + 121771.

It is an arithmetic number, because the mean of its divisors is an integer number (2190906).

Almost surely, 2^13388815 is an apocalyptic number.

13388815 is a deficient number, since it is larger than the sum of its proper divisors (4138433).

13388815 is a wasteful number, since it uses less digits than its factorization.

13388815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243449.

The product of its digits is 23040, while the sum is 37.

The square root of 13388815 is about 3659.0729700294. The cubic root of 13388815 is about 237.4546690954.

It can be divided in two parts, 133888 and 15, that added together give a triangular number (133903 = T₅₁₇).

The spelling of 13388815 in words is "thirteen million, three hundred eighty-eight thousand, eight hundred fifteen".