28263868 has 24 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 13339440.

The previous prime is 28263839. The next prime is 28263869. The reversal of 28263868 is 86836282.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28263869) 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, 28623 + ... + 29593.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^28263868 is an apocalyptic number.

It is an amenable number.

28263868 is a deficient number, since it is larger than the sum of its proper divisors (23990852).

28263868 is a wasteful number, since it uses less digits than its factorization.

28263868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377 (or 1375 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 28263868 is about 5316.3773380000. The cubic root of 28263868 is about 304.6097957255.

The spelling of 28263868 in words is "twenty-eight million, two hundred sixty-three thousand, eight hundred sixty-eight".