28396256128 has 16 divisors (see below), whose sum is σ = 56570666760. Its totient is φ = 14198128000.

The previous prime is 28396256123. The next prime is 28396256137. The reversal of 28396256128 is 82165269382.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28396256123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110922748 + ... + 110923003.

Almost surely, 2^28396256128 is an apocalyptic number.

It is an amenable number.

28396256128 is a deficient number, since it is larger than the sum of its proper divisors (28174410632).

28396256128 is an equidigital number, since it uses as much as digits as its factorization.

28396256128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221845765 (or 221845753 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 52.

The spelling of 28396256128 in words is "twenty-eight billion, three hundred ninety-six million, two hundred fifty-six thousand, one hundred twenty-eight".