13909504 has 40 divisors (see below), whose sum is σ = 31770288. Its totient is φ = 5959680.

The previous prime is 13909499. The next prime is 13909507. The reversal of 13909504 is 40590931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13909507) 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, 1644 + ... + 5524.

Almost surely, 2^13909504 is an apocalyptic number.

13909504 is a gapful number since it is divisible by the number (14) 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 13909504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15885144).

13909504 is an abundant number, since it is smaller than the sum of its proper divisors (17860784).

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

13909504 is an frugal number, since it uses more digits than its factorization.

13909504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906 (or 3890 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 13909504 is about 3729.5447443354. The cubic root of 13909504 is about 240.4937981322.

The spelling of 13909504 in words is "thirteen million, nine hundred nine thousand, five hundred four".