13639216 has 20 divisors (see below), whose sum is σ = 26520624. Its totient is φ = 6795200.

The previous prime is 13639201. The next prime is 13639217. The reversal of 13639216 is 61293631.

It is not an unprimeable number, because it can be changed into a prime (13639217) 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, 3606 + ... + 6346.

Almost surely, 2^13639216 is an apocalyptic number.

13639216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13639216 is a deficient number, since it is larger than the sum of its proper divisors (12881408).

13639216 is a wasteful number, since it uses less digits than its factorization.

13639216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060 (or 3054 counting only the distinct ones).

The product of its digits is 5832, while the sum is 31.

The square root of 13639216 is about 3693.1309210479. The cubic root of 13639216 is about 238.9258478082.

The spelling of 13639216 in words is "thirteen million, six hundred thirty-nine thousand, two hundred sixteen".