8216128 has 14 divisors (see below), whose sum is σ = 16304006. Its totient is φ = 4108032.

The previous prime is 8216123. The next prime is 8216137.

8216128 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 7354944 + 861184 = 2712^2 + 928^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8216096 and 8216105.

It is not an unprimeable number, because it can be changed into a prime (8216123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64125 + ... + 64252.

Almost surely, 2^8216128 is an apocalyptic number.

It is an amenable number.

8216128 is a deficient number, since it is larger than the sum of its proper divisors (8087878).

8216128 is a wasteful number, since it uses less digits than its factorization.

8216128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128389 (or 128379 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 8216128 is about 2866.3789002852. The cubic root of 8216128 is about 201.7850865939.

The spelling of 8216128 in words is "eight million, two hundred sixteen thousand, one hundred twenty-eight".