28093236 has 12 divisors (see below), whose sum is σ = 65550912. Its totient is φ = 9364408.

The previous prime is 28093211. The next prime is 28093243. The reversal of 28093236 is 63239082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 28093197 and 28093206.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1170540 + ... + 1170563.

It is an arithmetic number, because the mean of its divisors is an integer number (5462576).

Almost surely, 2^28093236 is an apocalyptic number.

It is an amenable number.

28093236 is an abundant number, since it is smaller than the sum of its proper divisors (37457676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28093236 is a wasteful number, since it uses less digits than its factorization.

28093236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341110 (or 2341108 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 28093236 is about 5300.3052742271. The cubic root of 28093236 is about 303.9955706880.

The spelling of 28093236 in words is "twenty-eight million, ninety-three thousand, two hundred thirty-six".