13281938 has 8 divisors (see below), whose sum is σ = 19948032. Its totient is φ = 6632596.

The previous prime is 13281911. The next prime is 13281941. The reversal of 13281938 is 83918231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13281898 and 13281907.

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 3 ways as a sum of consecutive naturals, for example, 1970 + ... + 5517.

It is an arithmetic number, because the mean of its divisors is an integer number (2493504).

Almost surely, 2^13281938 is an apocalyptic number.

13281938 is a deficient number, since it is larger than the sum of its proper divisors (6666094).

13281938 is an equidigital number, since it uses as much as digits as its factorization.

13281938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8376.

The product of its digits is 10368, while the sum is 35.

The square root of 13281938 is about 3644.4393258772. The cubic root of 13281938 is about 236.8211484528.

The spelling of 13281938 in words is "thirteen million, two hundred eighty-one thousand, nine hundred thirty-eight".