16776228 has 72 divisors (see below), whose sum is σ = 46143552. Its totient is φ = 4729536.

The previous prime is 16776217. The next prime is 16776289. The reversal of 16776228 is 82267761.

Its product of digits (56448) is a multiple of the sum of its prime divisors (392).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60426 + ... + 60702.

Almost surely, 2^16776228 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 16776228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23071776).

16776228 is an abundant number, since it is smaller than the sum of its proper divisors (29367324).

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

16776228 is a wasteful number, since it uses less digits than its factorization.

16776228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 392 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 16776228 is about 4095.8793927556. The cubic root of 16776228 is about 255.9949746735.

The spelling of 16776228 in words is "sixteen million, seven hundred seventy-six thousand, two hundred twenty-eight".