16780228 has 6 divisors (see below), whose sum is σ = 29365406. Its totient is φ = 8390112.

The previous prime is 16780213. The next prime is 16780229. The reversal of 16780228 is 82208761.

It can be written as a sum of positive squares in only one way, i.e., 15507844 + 1272384 = 3938^2 + 1128^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16780193 and 16780202.

It is not an unprimeable number, because it can be changed into a prime (16780229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097525 + ... + 2097532.

Almost surely, 2^16780228 is an apocalyptic number.

It is an amenable number.

16780228 is a deficient number, since it is larger than the sum of its proper divisors (12585178).

16780228 is a wasteful number, since it uses less digits than its factorization.

16780228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4195061 (or 4195059 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 16780228 is about 4096.3676592806. The cubic root of 16780228 is about 256.0153189075.

Adding to 16780228 its reverse (82208761), we get a palindrome (98988989).

It can be divided in two parts, 167 and 80228, that multiplied together give a triangular number (13398076 = T₅₁₇₆).

The spelling of 16780228 in words is "sixteen million, seven hundred eighty thousand, two hundred twenty-eight".