13509774 has 32 divisors (see below), whose sum is σ = 30666240. Its totient is φ = 4406616.

The previous prime is 13509757. The next prime is 13509803. The reversal of 13509774 is 47790531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124 + ... + 5199.

It is an arithmetic number, because the mean of its divisors is an integer number (958320).

Almost surely, 2^13509774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13509774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15333120).

13509774 is an abundant number, since it is smaller than the sum of its proper divisors (17156466).

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

13509774 is a wasteful number, since it uses less digits than its factorization.

13509774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381 (or 5375 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 13509774 is about 3675.5644464490. The cubic root of 13509774 is about 238.1676078509.

The spelling of 13509774 in words is "thirteen million, five hundred nine thousand, seven hundred seventy-four".