13405338 has 24 divisors (see below), whose sum is σ = 30121728. Its totient is φ = 4468284.

The previous prime is 13405309. The next prime is 13405349. The reversal of 13405338 is 83350431.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 13306 + ... + 14277.

It is an arithmetic number, because the mean of its divisors is an integer number (1255072).

Almost surely, 2^13405338 is an apocalyptic number.

13405338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13405338 is an abundant number, since it is smaller than the sum of its proper divisors (16716390).

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

13405338 is an equidigital number, since it uses as much as digits as its factorization.

13405338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27600 (or 27588 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 13405338 is about 3661.3300861845. The cubic root of 13405338 is about 237.5523090691.

Adding to 13405338 its reverse (83350431), we get a palindrome (96755769).

The spelling of 13405338 in words is "thirteen million, four hundred five thousand, three hundred thirty-eight".