28221802 has 48 divisors (see below), whose sum is σ = 54613440. Its totient is φ = 10647936.

The previous prime is 28221797. The next prime is 28221827. The reversal of 28221802 is 20812282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357199 + ... + 357277.

It is an arithmetic number, because the mean of its divisors is an integer number (1137780).

Almost surely, 2^28221802 is an apocalyptic number.

28221802 is a deficient number, since it is larger than the sum of its proper divisors (26391638).

28221802 is a wasteful number, since it uses less digits than its factorization.

28221802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 28221802 is about 5312.4195993916. The cubic root of 28221802 is about 304.4586005913.

It can be divided in two parts, 2822 and 1802, that added together give a square (4624 = 68²).

The spelling of 28221802 in words is "twenty-eight million, two hundred twenty-one thousand, eight hundred two".