28393012 has 12 divisors (see below), whose sum is σ = 49798336. Its totient is φ = 14164920.

The previous prime is 28393003. The next prime is 28393031. The reversal of 28393012 is 21039382.

It is a super-3 number, since 3×28393012³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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, 5814 + ... + 9517.

Almost surely, 2^28393012 is an apocalyptic number.

It is an amenable number.

28393012 is a deficient number, since it is larger than the sum of its proper divisors (21405324).

28393012 is a wasteful number, since it uses less digits than its factorization.

28393012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15798 (or 15796 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 28393012 is about 5328.5093600368. The cubic root of 28393012 is about 305.0730345569.

The spelling of 28393012 in words is "twenty-eight million, three hundred ninety-three thousand, twelve".