12228558 has 16 divisors (see below), whose sum is σ = 24547536. Its totient is φ = 4061120.

The previous prime is 12228553. The next prime is 12228563. The reversal of 12228558 is 85582221.

It is an interprime number because it is at equal distance from previous prime (12228553) and next prime (12228563).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12228551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941 + ... + 5312.

It is an arithmetic number, because the mean of its divisors is an integer number (1534221).

Almost surely, 2^12228558 is an apocalyptic number.

12228558 is an abundant number, since it is smaller than the sum of its proper divisors (12318978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12228558 is a wasteful number, since it uses less digits than its factorization.

12228558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7539.

The product of its digits is 12800, while the sum is 33.

The square root of 12228558 is about 3496.9355155622. The cubic root of 12228558 is about 230.3872367665.

It can be divided in two parts, 122 and 28558, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 12228558 in words is "twelve million, two hundred twenty-eight thousand, five hundred fifty-eight".