28366258 has 8 divisors (see below), whose sum is σ = 43027740. Its totient is φ = 14023680.

The previous prime is 28366249. The next prime is 28366279. The reversal of 28366258 is 85266382.

It can be written as a sum of positive squares in 2 ways, for example, as 23687689 + 4678569 = 4867^2 + 2163^2 .

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

It is a super-3 number, since 3×28366258³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28366258.

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, 79503 + ... + 79858.

Almost surely, 2^28366258 is an apocalyptic number.

28366258 is a deficient number, since it is larger than the sum of its proper divisors (14661482).

28366258 is a wasteful number, since it uses less digits than its factorization.

28366258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159452.

The product of its digits is 138240, while the sum is 40.

The square root of 28366258 is about 5325.9983101762. The cubic root of 28366258 is about 304.9771836376.

The spelling of 28366258 in words is "twenty-eight million, three hundred sixty-six thousand, two hundred fifty-eight".