28393222 has 16 divisors (see below), whose sum is σ = 50036112. Its totient is φ = 11913120.

The previous prime is 28393207. The next prime is 28393223. The reversal of 28393222 is 22239382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28393223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 49353 + ... + 49924.

It is an arithmetic number, because the mean of its divisors is an integer number (3127257).

Almost surely, 2^28393222 is an apocalyptic number.

28393222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28393222 is a deficient number, since it is larger than the sum of its proper divisors (21642890).

28393222 is a wasteful number, since it uses less digits than its factorization.

28393222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99303.

The product of its digits is 10368, while the sum is 31.

The square root of 28393222 is about 5328.5290653238. The cubic root of 28393222 is about 305.0737866807.

The spelling of 28393222 in words is "twenty-eight million, three hundred ninety-three thousand, two hundred twenty-two".