28660857258 has 32 divisors (see below), whose sum is σ = 62590464000. Its totient is φ = 8677096560.

The previous prime is 28660857217. The next prime is 28660857289. The reversal of 28660857258 is 85275806682.

It is a junction number, because it is equal to n+sod(n) for n = 28660857198 and 28660857207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128008 + ... + 271491.

It is an arithmetic number, because the mean of its divisors is an integer number (1955952000).

Almost surely, 2^28660857258 is an apocalyptic number.

28660857258 is an abundant number, since it is smaller than the sum of its proper divisors (33929606742).

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

28660857258 is a wasteful number, since it uses less digits than its factorization.

28660857258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400602.

The product of its (nonzero) digits is 12902400, while the sum is 57.

The spelling of 28660857258 in words is "twenty-eight billion, six hundred sixty million, eight hundred fifty-seven thousand, two hundred fifty-eight".