28866259 has 4 divisors (see below), whose sum is σ = 28883304. Its totient is φ = 28849216.

The previous prime is 28866251. The next prime is 28866307. The reversal of 28866259 is 95266882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95266882 = 2 ⋅47633441.

It is a cyclic number.

It is not a de Polignac number, because 28866259 - 2³ = 28866251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28866251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5662 + ... + 9475.

It is an arithmetic number, because the mean of its divisors is an integer number (7220826).

Almost surely, 2^28866259 is an apocalyptic number.

28866259 is a deficient number, since it is larger than the sum of its proper divisors (17045).

28866259 is a wasteful number, since it uses less digits than its factorization.

28866259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17044.

The product of its digits is 414720, while the sum is 46.

The square root of 28866259 is about 5372.7329172405. The cubic root of 28866259 is about 306.7586618824.

The spelling of 28866259 in words is "twenty-eight million, eight hundred sixty-six thousand, two hundred fifty-nine".