13828491 has 24 divisors (see below), whose sum is σ = 20736144. Its totient is φ = 8873280.

The previous prime is 13828487. The next prime is 13828513. The reversal of 13828491 is 19482831.

It is not a de Polignac number, because 13828491 - 2² = 13828487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13828411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43465 + ... + 43781.

It is an arithmetic number, because the mean of its divisors is an integer number (864006).

Almost surely, 2^13828491 is an apocalyptic number.

13828491 is a deficient number, since it is larger than the sum of its proper divisors (6907653).

13828491 is a wasteful number, since it uses less digits than its factorization.

13828491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 488 counting only the distinct ones).

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

The square root of 13828491 is about 3718.6679066569. The cubic root of 13828491 is about 240.0259867694.

The spelling of 13828491 in words is "thirteen million, eight hundred twenty-eight thousand, four hundred ninety-one".