28266823 has 8 divisors (see below), whose sum is σ = 31423616. Its totient is φ = 25250400.

The previous prime is 28266817. The next prime is 28266829. The reversal of 28266823 is 32866282.

It is an interprime number because it is at equal distance from previous prime (28266817) and next prime (28266829).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28266823 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 (28266829) 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, 34668 + ... + 35473.

It is an arithmetic number, because the mean of its divisors is an integer number (3927952).

Almost surely, 2^28266823 is an apocalyptic number.

28266823 is a deficient number, since it is larger than the sum of its proper divisors (3156793).

28266823 is a wasteful number, since it uses less digits than its factorization.

28266823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70185.

The product of its digits is 55296, while the sum is 37.

The square root of 28266823 is about 5316.6552455468. The cubic root of 28266823 is about 304.6204110522.

The spelling of 28266823 in words is "twenty-eight million, two hundred sixty-six thousand, eight hundred twenty-three".