13240144 has 20 divisors (see below), whose sum is σ = 27162324. Its totient is φ = 6230528.

The previous prime is 13240141. The next prime is 13240159. The reversal of 13240144 is 44104231.

It can be written as a sum of positive squares in 2 ways, for example, as 8880400 + 4359744 = 2980^2 + 2088^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24067 + ... + 24610.

Almost surely, 2^13240144 is an apocalyptic number.

It is an amenable number.

13240144 is an abundant number, since it is smaller than the sum of its proper divisors (13922180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13240144 is a wasteful number, since it uses less digits than its factorization.

13240144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48702 (or 48696 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 13240144 is about 3638.7008670678. The cubic root of 13240144 is about 236.5724873790.

Adding to 13240144 its reverse (44104231), we get a palindrome (57344375).

The spelling of 13240144 in words is "thirteen million, two hundred forty thousand, one hundred forty-four".