13289445 has 24 divisors (see below), whose sum is σ = 24808056. Its totient is φ = 6542208.

The previous prime is 13289387. The next prime is 13289447. The reversal of 13289445 is 54498231.

13289445 is a `hidden beast` number, since 132 + 89 + 445 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 25281 + 13264164 = 159^2 + 3642^2 .

It is not a de Polignac number, because 13289445 - 2⁷ = 13289317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13289447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10774 + ... + 11943.

It is an arithmetic number, because the mean of its divisors is an integer number (1033669).

Almost surely, 2^13289445 is an apocalyptic number.

13289445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13289445 is a deficient number, since it is larger than the sum of its proper divisors (11518611).

13289445 is a wasteful number, since it uses less digits than its factorization.

13289445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22741 (or 22738 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 13289445 is about 3645.4691056159. The cubic root of 13289445 is about 236.8657574430.

The spelling of 13289445 in words is "thirteen million, two hundred eighty-nine thousand, four hundred forty-five".