28113413 has 8 divisors (see below), whose sum is σ = 29100120. Its totient is φ = 27141120.

The previous prime is 28113403. The next prime is 28113431. The reversal of 28113413 is 31431182.

It can be written as a sum of positive squares in 4 ways, for example, as 2209 + 28111204 = 47^2 + 5302^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28113413 - 2¹⁰ = 28112389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28113403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443 + ... + 7511.

It is an arithmetic number, because the mean of its divisors is an integer number (3637515).

Almost surely, 2^28113413 is an apocalyptic number.

It is an amenable number.

28113413 is a deficient number, since it is larger than the sum of its proper divisors (986707).

28113413 is an equidigital number, since it uses as much as digits as its factorization.

28113413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7207.

The product of its digits is 576, while the sum is 23.

The square root of 28113413 is about 5302.2083135237. The cubic root of 28113413 is about 304.0683313906.

Adding to 28113413 its reverse (31431182), we get a palindrome (59544595).

The spelling of 28113413 in words is "twenty-eight million, one hundred thirteen thousand, four hundred thirteen".