13606840 has 64 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 4961280.

The previous prime is 13606837. The next prime is 13606847. The reversal of 13606840 is 4860631.

It is a junction number, because it is equal to n+sod(n) for n = 13606799 and 13606808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13606847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71145 + ... + 71335.

It is an arithmetic number, because the mean of its divisors is an integer number (521640).

Almost surely, 2^13606840 is an apocalyptic number.

13606840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13606840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16692480).

13606840 is an abundant number, since it is smaller than the sum of its proper divisors (19778120).

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

13606840 is a wasteful number, since it uses less digits than its factorization.

13606840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 13606840 is about 3688.7450440495. The cubic root of 13606840 is about 238.7366484680.

The spelling of 13606840 in words is "thirteen million, six hundred six thousand, eight hundred forty".