28580805256 has 32 divisors (see below), whose sum is σ = 54332308800. Its totient is φ = 14093553600.

The previous prime is 28580805241. The next prime is 28580805257. The reversal of 28580805256 is 65250808582.

It is not an unprimeable number, because it can be changed into a prime (28580805257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82806 + ... + 253018.

It is an arithmetic number, because the mean of its divisors is an integer number (1697884650).

Almost surely, 2^28580805256 is an apocalyptic number.

It is an amenable number.

28580805256 is a deficient number, since it is larger than the sum of its proper divisors (25751503544).

28580805256 is a wasteful number, since it uses less digits than its factorization.

28580805256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170509 (or 170505 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 49.

The spelling of 28580805256 in words is "twenty-eight billion, five hundred eighty million, eight hundred five thousand, two hundred fifty-six".