16311228 has 48 divisors (see below), whose sum is σ = 41406624. Its totient is φ = 4976640.

The previous prime is 16311223. The next prime is 16311241. The reversal of 16311228 is 82211361.

It is a junction number, because it is equal to n+sod(n) for n = 16311198 and 16311207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16311223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6468 + ... + 8628.

It is an arithmetic number, because the mean of its divisors is an integer number (862638).

Almost surely, 2^16311228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16311228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20703312).

16311228 is an abundant number, since it is smaller than the sum of its proper divisors (25095396).

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

16311228 is a wasteful number, since it uses less digits than its factorization.

16311228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222 (or 2220 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 16311228 is about 4038.7161326342. The cubic root of 16311228 is about 253.6075739030.

Adding to 16311228 its reverse (82211361), we get a palindrome (98522589).

The spelling of 16311228 in words is "sixteen million, three hundred eleven thousand, two hundred twenty-eight".