13889736 has 144 divisors (see below), whose sum is σ = 45527040. Its totient is φ = 3810240.

The previous prime is 13889717. The next prime is 13889737. The reversal of 13889736 is 63798831.

It is a happy number.

13889736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13889736² = 385849532299392, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 13889691 and 13889700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13889737) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 109305 + ... + 109431.

It is an arithmetic number, because the mean of its divisors is an integer number (316160).

Almost surely, 2^13889736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13889736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22763520).

13889736 is an abundant number, since it is smaller than the sum of its proper divisors (31637304).

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

13889736 is a wasteful number, since it uses less digits than its factorization.

13889736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 170 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 13889736 is about 3726.8936126485. The cubic root of 13889736 is about 240.3798152678.

The spelling of 13889736 in words is "thirteen million, eight hundred eighty-nine thousand, seven hundred thirty-six".