13682440 has 16 divisors (see below), whose sum is σ = 30785580. Its totient is φ = 5472960.

The previous prime is 13682437. The next prime is 13682441. The reversal of 13682440 is 4428631.

It can be written as a sum of positive squares in 2 ways, for example, as 13557124 + 125316 = 3682^2 + 354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13682399 and 13682408.

It is not an unprimeable number, because it can be changed into a prime (13682441) 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, 170991 + ... + 171070.

Almost surely, 2^13682440 is an apocalyptic number.

13682440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13682440 is an abundant number, since it is smaller than the sum of its proper divisors (17103140).

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

13682440 is a wasteful number, since it uses less digits than its factorization.

13682440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342072 (or 342068 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 13682440 is about 3698.9782372974. The cubic root of 13682440 is about 239.1779747284.

The spelling of 13682440 in words is "thirteen million, six hundred eighty-two thousand, four hundred forty".