13438557 has 12 divisors (see below), whose sum is σ = 21176064. Its totient is φ = 8144520.

The previous prime is 13438553. The next prime is 13438559. The reversal of 13438557 is 75583431.

It is not a de Polignac number, because 13438557 - 2² = 13438553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13438553) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 67773 + ... + 67970.

It is an arithmetic number, because the mean of its divisors is an integer number (1764672).

Almost surely, 2^13438557 is an apocalyptic number.

It is an amenable number.

13438557 is a deficient number, since it is larger than the sum of its proper divisors (7737507).

13438557 is a wasteful number, since it uses less digits than its factorization.

13438557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135760 (or 135757 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 13438557 is about 3665.8637454221. The cubic root of 13438557 is about 237.7483687987.

The spelling of 13438557 in words is "thirteen million, four hundred thirty-eight thousand, five hundred fifty-seven".