13281936 has 20 divisors (see below), whose sum is σ = 34311792. Its totient is φ = 4427296.

The previous prime is 13281911. The next prime is 13281941. The reversal of 13281936 is 63918231.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13281897 and 13281906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138306 + ... + 138401.

Almost surely, 2^13281936 is an apocalyptic number.

13281936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13281936 is an abundant number, since it is smaller than the sum of its proper divisors (21029856).

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

13281936 is a wasteful number, since it uses less digits than its factorization.

13281936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276718 (or 276712 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 13281936 is about 3644.4390514865. The cubic root of 13281936 is about 236.8211365660.

The spelling of 13281936 in words is "thirteen million, two hundred eighty-one thousand, nine hundred thirty-six".