13928481 has 12 divisors (see below), whose sum is σ = 22993152. Its totient is φ = 7959096.

The previous prime is 13928477. The next prime is 13928503. The reversal of 13928481 is 18482931.

It is not a de Polignac number, because 13928481 - 2² = 13928477 is a prime.

It is a super-2 number, since 2×13928481² = 388005165934722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13928441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110481 + ... + 110606.

It is an arithmetic number, because the mean of its divisors is an integer number (1916096).

Almost surely, 2^13928481 is an apocalyptic number.

It is an amenable number.

13928481 is a deficient number, since it is larger than the sum of its proper divisors (9064671).

13928481 is a wasteful number, since it uses less digits than its factorization.

13928481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221100 (or 221097 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 13928481 is about 3732.0880214700. The cubic root of 13928481 is about 240.6031185140.

The spelling of 13928481 in words is "thirteen million, nine hundred twenty-eight thousand, four hundred eighty-one".