28566408256 has 63 divisors (see below), whose sum is σ = 58362150357. Its totient is φ = 13872833280.

The previous prime is 28566408251. The next prime is 28566408257. The reversal of 28566408256 is 65280466582.

It is a happy number.

The square root of 28566408256 is 169016.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 25561614400 + 3004793856 = 159880^2 + 54816^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28566408251) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 50028451 + ... + 50029021.

It is an arithmetic number, because the mean of its divisors is an integer number (926383339).

Almost surely, 2^28566408256 is an apocalyptic number.

28566408256 is the 169016-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28566408256

28566408256 is an abundant number, since it is smaller than the sum of its proper divisors (29795742101).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28566408256 is an frugal number, since it uses more digits than its factorization.

28566408256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 52.

The spelling of 28566408256 in words is "twenty-eight billion, five hundred sixty-six million, four hundred eight thousand, two hundred fifty-six".