28966293 has 6 divisors (see below), whose sum is σ = 41840214. Its totient is φ = 19310856.

The previous prime is 28966247. The next prime is 28966297. The reversal of 28966293 is 39266982.

It can be written as a sum of positive squares in only one way, i.e., 28804689 + 161604 = 5367^2 + 402^2 .

It is not a de Polignac number, because 28966293 - 2¹⁰ = 28965269 is a prime.

It is a super-2 number, since 2×28966293² = 1678092260323698, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28966297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1609230 + ... + 1609247.

It is an arithmetic number, because the mean of its divisors is an integer number (6973369).

Almost surely, 2^28966293 is an apocalyptic number.

It is an amenable number.

28966293 is a deficient number, since it is larger than the sum of its proper divisors (12873921).

28966293 is a wasteful number, since it uses less digits than its factorization.

28966293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218483 (or 3218480 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 28966293 is about 5382.0342808273. The cubic root of 28966293 is about 307.1126035668.

The spelling of 28966293 in words is "twenty-eight million, nine hundred sixty-six thousand, two hundred ninety-three".