28505258580850 has 48 divisors (see below), whose sum is σ = 54735729117696. Its totient is φ = 11033158032000.

The previous prime is 28505258580703. The next prime is 28505258580913. The reversal of 28505258580850 is 5808585250582.

It is a super-2 number, since 2×28505258580850² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14197390 + ... + 16080310.

It is an arithmetic number, because the mean of its divisors is an integer number (1140327689952).

Almost surely, 2^{28505258580850} is an apocalyptic number.

28505258580850 is a deficient number, since it is larger than the sum of its proper divisors (26230470536846).

28505258580850 is a wasteful number, since it uses less digits than its factorization.

28505258580850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892731 (or 1892726 counting only the distinct ones).

The product of its (nonzero) digits is 51200000, while the sum is 61.

The spelling of 28505258580850 in words is "twenty-eight trillion, five hundred five billion, two hundred fifty-eight million, five hundred eighty thousand, eight hundred fifty".