28335213 has 12 divisors (see below), whose sum is σ = 43083040. Its totient is φ = 17895816.

The previous prime is 28335211. The next prime is 28335217. The reversal of 28335213 is 31253382.

It is not a de Polignac number, because 28335213 - 2¹ = 28335211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28335211) 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 11 ways as a sum of consecutive naturals, for example, 82681 + ... + 83022.

Almost surely, 2^28335213 is an apocalyptic number.

It is an amenable number.

28335213 is a deficient number, since it is larger than the sum of its proper divisors (14747827).

28335213 is a wasteful number, since it uses less digits than its factorization.

28335213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165728 (or 165725 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 28335213 is about 5323.0830352344. The cubic root of 28335213 is about 304.8658838813.

Adding to 28335213 its reverse (31253382), we get a palindrome (59588595).

It can be divided in two parts, 28 and 335213, that added together give a square (335241 = 579²).

The spelling of 28335213 in words is "twenty-eight million, three hundred thirty-five thousand, two hundred thirteen".