13809732 has 48 divisors (see below), whose sum is σ = 34856640. Its totient is φ = 4240512.

The previous prime is 13809709. The next prime is 13809749. The reversal of 13809732 is 23790831.

It is a junction number, because it is equal to n+sod(n) for n = 13809693 and 13809702.

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, 7618 + ... + 9254.

It is an arithmetic number, because the mean of its divisors is an integer number (726180).

Almost surely, 2^13809732 is an apocalyptic number.

13809732 is a gapful number since it is divisible by the number (12) 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 13809732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17428320).

13809732 is an abundant number, since it is smaller than the sum of its proper divisors (21046908).

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

13809732 is a wasteful number, since it uses less digits than its factorization.

13809732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 13809732 is about 3716.1447765123. The cubic root of 13809732 is about 239.9174021321.

It can be divided in two parts, 13809 and 732, that added together give a palindrome (14541).

The spelling of 13809732 in words is "thirteen million, eight hundred nine thousand, seven hundred thirty-two".