123644228 has 36 divisors (see below), whose sum is σ = 229658688. Its totient is φ = 58230480.

The previous prime is 123644207. The next prime is 123644231. The reversal of 123644228 is 822446321.

It is a junction number, because it is equal to n+sod(n) for n = 123644194 and 123644203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149825 + ... + 150647.

It is an arithmetic number, because the mean of its divisors is an integer number (6379408).

Almost surely, 2^123644228 is an apocalyptic number.

It is an amenable number.

123644228 is a deficient number, since it is larger than the sum of its proper divisors (106014460).

123644228 is a wasteful number, since it uses less digits than its factorization.

123644228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 919 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 123644228 is about 11119.5426164928. The cubic root of 123644228 is about 498.1857288025.

The spelling of 123644228 in words is "one hundred twenty-three million, six hundred forty-four thousand, two hundred twenty-eight".