28266293 has 8 divisors (see below), whose sum is σ = 30878976. Its totient is φ = 25660800.

The previous prime is 28266283. The next prime is 28266299. The reversal of 28266293 is 39266282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28266293 - 2¹⁰ = 28265269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28266299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9605 + ... + 12197.

It is an arithmetic number, because the mean of its divisors is an integer number (3859872).

Almost surely, 2^28266293 is an apocalyptic number.

It is an amenable number.

28266293 is a deficient number, since it is larger than the sum of its proper divisors (2612683).

28266293 is a wasteful number, since it uses less digits than its factorization.

28266293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3595.

The product of its digits is 62208, while the sum is 38.

The square root of 28266293 is about 5316.6054019459. The cubic root of 28266293 is about 304.6185071732.

It can be divided in two parts, 2826 and 6293, that added together give a palindrome (9119).

The spelling of 28266293 in words is "twenty-eight million, two hundred sixty-six thousand, two hundred ninety-three".