123731228 has 12 divisors (see below), whose sum is σ = 216854232. Its totient is φ = 61772880.

The previous prime is 123731221. The next prime is 123731233. The reversal of 123731228 is 822137321.

It is a self number, because there is not a number n which added to its sum of digits gives 123731228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123731221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20138 + ... + 25553.

It is an arithmetic number, because the mean of its divisors is an integer number (18071186).

Almost surely, 2^123731228 is an apocalyptic number.

It is an amenable number.

123731228 is a deficient number, since it is larger than the sum of its proper divisors (93123004).

123731228 is a wasteful number, since it uses less digits than its factorization.

123731228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46372 (or 46370 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 123731228 is about 11123.4539599892. The cubic root of 123731228 is about 498.3025478335.

Adding to 123731228 its reverse (822137321), we get a palindrome (945868549).

The spelling of 123731228 in words is "one hundred twenty-three million, seven hundred thirty-one thousand, two hundred twenty-eight".