28755213 has 16 divisors (see below), whose sum is σ = 39223296. Its totient is φ = 18733680.

The previous prime is 28755193. The next prime is 28755239. The reversal of 28755213 is 31255782.

It is not a de Polignac number, because 28755213 - 2⁶ = 28755149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28755283) 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 15 ways as a sum of consecutive naturals, for example, 26520 + ... + 27582.

It is an arithmetic number, because the mean of its divisors is an integer number (2451456).

Almost surely, 2^28755213 is an apocalyptic number.

It is an amenable number.

28755213 is a deficient number, since it is larger than the sum of its proper divisors (10468083).

28755213 is a wasteful number, since it uses less digits than its factorization.

28755213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264.

The product of its digits is 16800, while the sum is 33.

The square root of 28755213 is about 5362.3887401045. The cubic root of 28755213 is about 306.3647983894.

The spelling of 28755213 in words is "twenty-eight million, seven hundred fifty-five thousand, two hundred thirteen".