28276863 has 8 divisors (see below), whose sum is σ = 37742208. Its totient is φ = 18831384.

The previous prime is 28276861. The next prime is 28276873. The reversal of 28276863 is 36867282.

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

It is not a de Polignac number, because 28276863 - 2¹ = 28276861 is a prime.

It is a super-2 number, since 2×28276863² = 1599161962241538, which contains 22 as substring.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28276861) 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, 1245 + ... + 7622.

It is an arithmetic number, because the mean of its divisors is an integer number (4717776).

Almost surely, 2^28276863 is an apocalyptic number.

28276863 is a deficient number, since it is larger than the sum of its proper divisors (9465345).

28276863 is a wasteful number, since it uses less digits than its factorization.

28276863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9933.

The product of its digits is 193536, while the sum is 42.

The square root of 28276863 is about 5317.5993643749. The cubic root of 28276863 is about 304.6564724907.

The spelling of 28276863 in words is "twenty-eight million, two hundred seventy-six thousand, eight hundred sixty-three".