13528889 has 12 divisors (see below), whose sum is σ = 15747732. Its totient is φ = 11573760.

The previous prime is 13528859. The next prime is 13528891. The reversal of 13528889 is 98882531.

13528889 = T₂₀₆ + T₂₀₇ + ... + T₄₄₇.

13528889 is digitally balanced in base 3, 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 2 ways, for example, as 12390400 + 1138489 = 3520^2 + 1067^2 .

It is not a de Polignac number, because 13528889 - 2²⁰ = 12480313 is a prime.

It is a super-4 number, since 4×13528889⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (13528859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1232 + ... + 5345.

It is an arithmetic number, because the mean of its divisors is an integer number (1312311).

Almost surely, 2^13528889 is an apocalyptic number.

It is an amenable number.

13528889 is a deficient number, since it is larger than the sum of its proper divisors (2218843).

13528889 is a wasteful number, since it uses less digits than its factorization.

13528889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616 (or 6605 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 13528889 is about 3678.1638082065. The cubic root of 13528889 is about 238.2798828197.

The spelling of 13528889 in words is "thirteen million, five hundred twenty-eight thousand, eight hundred eighty-nine".