65128228 has 24 divisors (see below), whose sum is σ = 125445600. Its totient is φ = 29339520.

The previous prime is 65128223. The next prime is 65128253. The reversal of 65128228 is 82282156.

65128228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 65128193 and 65128202.

It is not an unprimeable number, because it can be changed into a prime (65128223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578 + ... + 11521.

It is an arithmetic number, because the mean of its divisors is an integer number (5226900).

Almost surely, 2^65128228 is an apocalyptic number.

It is an amenable number.

65128228 is a deficient number, since it is larger than the sum of its proper divisors (60317372).

65128228 is a wasteful number, since it uses less digits than its factorization.

65128228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13227 (or 13225 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 65128228 is about 8070.2061931527. The cubic root of 65128228 is about 402.3367968669.

It can be divided in two parts, 65128 and 228, that added together give a palindrome (65356).

The spelling of 65128228 in words is "sixty-five million, one hundred twenty-eight thousand, two hundred twenty-eight".