28863258 has 16 divisors (see below), whose sum is σ = 58021920. Its totient is φ = 9571856.

The previous prime is 28863239. The next prime is 28863269. The reversal of 28863258 is 85236882.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 7 ways as a sum of consecutive naturals, for example, 11028 + ... + 13391.

It is an arithmetic number, because the mean of its divisors is an integer number (3626370).

Almost surely, 2^28863258 is an apocalyptic number.

28863258 is an abundant number, since it is smaller than the sum of its proper divisors (29158662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28863258 is a wasteful number, since it uses less digits than its factorization.

28863258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24621.

The product of its digits is 184320, while the sum is 42.

The square root of 28863258 is about 5372.4536293950. The cubic root of 28863258 is about 306.7480310781.

It can be divided in two parts, 288 and 63258, that added together give a triangular number (63546 = T₃₅₆).

The spelling of 28863258 in words is "twenty-eight million, eight hundred sixty-three thousand, two hundred fifty-eight".