13538885 has 16 divisors (see below), whose sum is σ = 17334000. Its totient is φ = 10116096.

The previous prime is 13538879. The next prime is 13538923. The reversal of 13538885 is 58883531.

13538885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 332929 + 13205956 = 577^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 13538885 - 2⁶ = 13538821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12131 + ... + 13199.

It is an arithmetic number, because the mean of its divisors is an integer number (1083375).

Almost surely, 2^13538885 is an apocalyptic number.

It is an amenable number.

13538885 is a deficient number, since it is larger than the sum of its proper divisors (3795115).

13538885 is a wasteful number, since it uses less digits than its factorization.

13538885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240.

The product of its digits is 115200, while the sum is 41.

The square root of 13538885 is about 3679.5223874845. The cubic root of 13538885 is about 238.3385537948.

The spelling of 13538885 in words is "thirteen million, five hundred thirty-eight thousand, eight hundred eighty-five".