13409838 has 48 divisors (see below), whose sum is σ = 33140016. Its totient is φ = 3882240.

The previous prime is 13409831. The next prime is 13409843. The reversal of 13409838 is 83890431.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13409831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2293 + ... + 5663.

It is an arithmetic number, because the mean of its divisors is an integer number (690417).

Almost surely, 2^13409838 is an apocalyptic number.

13409838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13409838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16570008).

13409838 is an abundant number, since it is smaller than the sum of its proper divisors (19730178).

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

13409838 is a wasteful number, since it uses less digits than its factorization.

13409838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409 (or 3406 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 13409838 is about 3661.9445653915. The cubic root of 13409838 is about 237.5788871829.

The spelling of 13409838 in words is "thirteen million, four hundred nine thousand, eight hundred thirty-eight".