16228812 has 96 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 4672512.

The previous prime is 16228801. The next prime is 16228813. The reversal of 16228812 is 21882261.

It is a self number, because there is not a number n which added to its sum of digits gives 16228812.

It is not an unprimeable number, because it can be changed into a prime (16228813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205389 + ... + 205467.

It is an arithmetic number, because the mean of its divisors is an integer number (453600).

Almost surely, 2^16228812 is an apocalyptic number.

16228812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is a pronic number, being equal to 4028×4029.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16228812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21772800).

16228812 is an abundant number, since it is smaller than the sum of its proper divisors (27316788).

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

16228812 is a wasteful number, since it uses less digits than its factorization.

16228812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 173 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 16228812 is about 4028.4999689711. The cubic root of 16228812 is about 253.1797168102.

The spelling of 16228812 in words is "sixteen million, two hundred twenty-eight thousand, eight hundred twelve".