28216868 has 12 divisors (see below), whose sum is σ = 50216880. Its totient is φ = 13869192.

The previous prime is 28216847. The next prime is 28216879. The reversal of 28216868 is 86861282.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59546 + ... + 60017.

It is an arithmetic number, because the mean of its divisors is an integer number (4184740).

Almost surely, 2^28216868 is an apocalyptic number.

It is an amenable number.

28216868 is a deficient number, since it is larger than the sum of its proper divisors (22000012).

28216868 is a wasteful number, since it uses less digits than its factorization.

28216868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119626 (or 119624 counting only the distinct ones).

The product of its digits is 73728, while the sum is 41.

The square root of 28216868 is about 5311.9551955942. The cubic root of 28216868 is about 304.4408567882.

The spelling of 28216868 in words is "twenty-eight million, two hundred sixteen thousand, eight hundred sixty-eight".