28905440256 has 891 divisors, whose sum is σ = 111561109023. Its totient is φ = 7181475840.

The previous prime is 28905440243. The next prime is 28905440257. The reversal of 28905440256 is 65204450982.

The square root of 28905440256 is 170016.

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

28905440256 is a `hidden beast` number, since 2 + 89 + 0 + 544 + 0 + 25 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (28905440257) 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 80 ways as a sum of consecutive naturals, for example, 1256758261 + ... + 1256758283.

Almost surely, 2^28905440256 is an apocalyptic number.

28905440256 is the 170016-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28905440256

28905440256 is an abundant number, since it is smaller than the sum of its proper divisors (82655668767).

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

28905440256 is a wasteful number, since it uses less digits than its factorization.

28905440256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 28905440256 in words is "twenty-eight billion, nine hundred five million, four hundred forty thousand, two hundred fifty-six".