28663222 has 16 divisors (see below), whose sum is σ = 49214880. Its totient is φ = 12264768.

The previous prime is 28663213. The next prime is 28663237. The reversal of 28663222 is 22236682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10804 + ... + 13192.

It is an arithmetic number, because the mean of its divisors is an integer number (3075930).

Almost surely, 2^28663222 is an apocalyptic number.

28663222 is a deficient number, since it is larger than the sum of its proper divisors (20551658).

28663222 is a wasteful number, since it uses less digits than its factorization.

28663222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255.

The product of its digits is 13824, while the sum is 31.

The square root of 28663222 is about 5353.8044417031. The cubic root of 28663222 is about 306.0377514761.

The spelling of 28663222 in words is "twenty-eight million, six hundred sixty-three thousand, two hundred twenty-two".