13809000 has 64 divisors (see below), whose sum is σ = 43093440. Its totient is φ = 3681600.

The previous prime is 13808969. The next prime is 13809011. The reversal of 13809000 is 90831.

13809000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699 + ... + 5301.

It is an arithmetic number, because the mean of its divisors is an integer number (673335).

Almost surely, 2^13809000 is an apocalyptic number.

13809000 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 13809000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21546720).

13809000 is an abundant number, since it is smaller than the sum of its proper divisors (29284440).

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

13809000 is a wasteful number, since it uses less digits than its factorization.

13809000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4627 (or 4613 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 13809000 is about 3716.0462860411. The cubic root of 13809000 is about 239.9131630288.

Adding to 13809000 its reverse (90831), we get a palindrome (13899831).

The spelling of 13809000 in words is "thirteen million, eight hundred nine thousand".