28894560256 has 69 divisors (see below), whose sum is σ = 58493756611. Its totient is φ = 14273216512.

The previous prime is 28894560241. The next prime is 28894560301. The reversal of 28894560256 is 65206549882.

The square root of 28894560256 is 169984.

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

It is a super-2 number, since 2×28894560256² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28894560197 and 28894560206.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 348127191 + ... + 348127273.

Almost surely, 2^28894560256 is an apocalyptic number.

28894560256 is the 169984-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28894560256

28894560256 is an abundant number, since it is smaller than the sum of its proper divisors (29599196355).

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

28894560256 is an frugal number, since it uses more digits than its factorization.

28894560256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 28894560256 in words is "twenty-eight billion, eight hundred ninety-four million, five hundred sixty thousand, two hundred fifty-six".