28128846266 has 8 divisors (see below), whose sum is σ = 42194053524. Its totient is φ = 14064161760.

The previous prime is 28128846241. The next prime is 28128846269. The reversal of 28128846266 is 66264882182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25035150625 + 3093695641 = 158225^2 + 55621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28128846269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58766 + ... + 244358.

Almost surely, 2^28128846266 is an apocalyptic number.

28128846266 is a deficient number, since it is larger than the sum of its proper divisors (14065207258).

28128846266 is a wasteful number, since it uses less digits than its factorization.

28128846266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261376.

The product of its digits is 3538944, while the sum is 53.

The spelling of 28128846266 in words is "twenty-eight billion, one hundred twenty-eight million, eight hundred forty-six thousand, two hundred sixty-six".