28222828 has 12 divisors (see below), whose sum is σ = 51989560. Its totient is φ = 13368672.

The previous prime is 28222819. The next prime is 28222849. The reversal of 28222828 is 82822282.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28222793 and 28222802.

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, 185601 + ... + 185752.

Almost surely, 2^28222828 is an apocalyptic number.

It is an amenable number.

28222828 is a deficient number, since it is larger than the sum of its proper divisors (23766732).

28222828 is a wasteful number, since it uses less digits than its factorization.

28222828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371376 (or 371374 counting only the distinct ones).

The product of its digits is 16384, while the sum is 34.

The square root of 28222828 is about 5312.5161646813. The cubic root of 28222828 is about 304.4622900644.

The spelling of 28222828 in words is "twenty-eight million, two hundred twenty-two thousand, eight hundred twenty-eight".