13606820 has 12 divisors (see below), whose sum is σ = 28574364. Its totient is φ = 5442720.

The previous prime is 13606819. The next prime is 13606837. The reversal of 13606820 is 2860631.

It can be written as a sum of positive squares in 2 ways, for example, as 5161984 + 8444836 = 2272^2 + 2906^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13606820.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340151 + ... + 340190.

It is an arithmetic number, because the mean of its divisors is an integer number (2381197).

Almost surely, 2^13606820 is an apocalyptic number.

13606820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13606820 is an abundant number, since it is smaller than the sum of its proper divisors (14967544).

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

13606820 is a wasteful number, since it uses less digits than its factorization.

13606820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680350 (or 680348 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 13606820 is about 3688.7423330995. The cubic root of 13606820 is about 238.7365314990.

The spelling of 13606820 in words is "thirteen million, six hundred six thousand, eight hundred twenty".