28917268 has 12 divisors (see below), whose sum is σ = 50722560. Its totient is φ = 14425112.

The previous prime is 28917253. The next prime is 28917269. The reversal of 28917268 is 86271982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28917269) by changing a digit.

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, 6388 + ... + 9931.

It is an arithmetic number, because the mean of its divisors is an integer number (4226880).

Almost surely, 2^28917268 is an apocalyptic number.

It is an amenable number.

28917268 is a deficient number, since it is larger than the sum of its proper divisors (21805292).

28917268 is a wasteful number, since it uses less digits than its factorization.

28917268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16766 (or 16764 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 28917268 is about 5377.4778474672. The cubic root of 28917268 is about 306.9392446272.

The spelling of 28917268 in words is "twenty-eight million, nine hundred seventeen thousand, two hundred sixty-eight".