13640272 has 20 divisors (see below), whose sum is σ = 27143476. Its totient is φ = 6635520.

The previous prime is 13640267. The next prime is 13640287. The reversal of 13640272 is 27204631.

It can be written as a sum of positive squares in 2 ways, for example, as 7706176 + 5934096 = 2776^2 + 2436^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10929 + ... + 12112.

Almost surely, 2^13640272 is an apocalyptic number.

It is an amenable number.

13640272 is a deficient number, since it is larger than the sum of its proper divisors (13503204).

13640272 is a wasteful number, since it uses less digits than its factorization.

13640272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23086 (or 23080 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 13640272 is about 3693.2738864049. The cubic root of 13640272 is about 238.9320138318.

The spelling of 13640272 in words is "thirteen million, six hundred forty thousand, two hundred seventy-two".