13640016 has 40 divisors (see below), whose sum is σ = 37948960. Its totient is φ = 4196736.

The previous prime is 13640009. The next prime is 13640017. The reversal of 13640016 is 61004631.

It is a junction number, because it is equal to n+sod(n) for n = 13639974 and 13640001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640017) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10306 + ... + 11553.

It is an arithmetic number, because the mean of its divisors is an integer number (948724).

Almost surely, 2^13640016 is an apocalyptic number.

13640016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13640016 is an abundant number, since it is smaller than the sum of its proper divisors (24308944).

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

13640016 is a wasteful number, since it uses less digits than its factorization.

13640016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21883 (or 21877 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 13640016 is about 3693.2392286447. The cubic root of 13640016 is about 238.9305190674.

Adding to 13640016 its reverse (61004631), we get a palindrome (74644647).

The spelling of 13640016 in words is "thirteen million, six hundred forty thousand, sixteen".