28873311 has 16 divisors (see below), whose sum is σ = 39141984. Its totient is φ = 18929664.

The previous prime is 28873297. The next prime is 28873319. The reversal of 28873311 is 11337882.

It is not a de Polignac number, because 28873311 - 2¹⁰ = 28872287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28873319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90925 + ... + 91241.

It is an arithmetic number, because the mean of its divisors is an integer number (2446374).

Almost surely, 2^28873311 is an apocalyptic number.

28873311 is a deficient number, since it is larger than the sum of its proper divisors (10268673).

28873311 is a wasteful number, since it uses less digits than its factorization.

28873311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730.

The product of its digits is 8064, while the sum is 33.

The square root of 28873311 is about 5373.3891539698. The cubic root of 28873311 is about 306.7836401329.

The spelling of 28873311 in words is "twenty-eight million, eight hundred seventy-three thousand, three hundred eleven".