28158263 has 8 divisors (see below), whose sum is σ = 32317440. Its totient is φ = 24033240.

The previous prime is 28158259. The next prime is 28158269. The reversal of 28158263 is 36285182.

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

It is not a de Polignac number, because 28158263 - 2² = 28158259 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 (28158269) 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, 6743 + ... + 10088.

It is an arithmetic number, because the mean of its divisors is an integer number (4039680).

Almost surely, 2^28158263 is an apocalyptic number.

28158263 is a deficient number, since it is larger than the sum of its proper divisors (4159177).

28158263 is a wasteful number, since it uses less digits than its factorization.

28158263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17077.

The product of its digits is 23040, while the sum is 35.

The square root of 28158263 is about 5306.4359979180. The cubic root of 28158263 is about 304.2299413076.

The spelling of 28158263 in words is "twenty-eight million, one hundred fifty-eight thousand, two hundred sixty-three".