16731228 has 12 divisors (see below), whose sum is σ = 39039560. Its totient is φ = 5577072.

The previous prime is 16731203. The next prime is 16731233. The reversal of 16731228 is 82213761.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 16731195 and 16731204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697123 + ... + 697146.

Almost surely, 2^16731228 is an apocalyptic number.

It is an amenable number.

16731228 is an abundant number, since it is smaller than the sum of its proper divisors (22308332).

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

16731228 is a wasteful number, since it uses less digits than its factorization.

16731228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394276 (or 1394274 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 16731228 is about 4090.3823782136. The cubic root of 16731228 is about 255.7658788894.

Adding to 16731228 its reverse (82213761), we get a palindrome (98944989).

The spelling of 16731228 in words is "sixteen million, seven hundred thirty-one thousand, two hundred twenty-eight".