123555228 has 24 divisors (see below), whose sum is σ = 288492288. Its totient is φ = 41156976.

The previous prime is 123555221. The next prime is 123555239. The reversal of 123555228 is 822555321.

It is a super-2 number, since 2×123555228² = 30531788732263968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123555221) 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, 22525 + ... + 27467.

It is an arithmetic number, because the mean of its divisors is an integer number (12020512).

Almost surely, 2^123555228 is an apocalyptic number.

It is an amenable number.

123555228 is an abundant number, since it is smaller than the sum of its proper divisors (164937060).

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

123555228 is a wasteful number, since it uses less digits than its factorization.

123555228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7033 (or 7031 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

The square root of 123555228 is about 11115.5399329047. The cubic root of 123555228 is about 498.0661675601.

The spelling of 123555228 in words is "one hundred twenty-three million, five hundred fifty-five thousand, two hundred twenty-eight".