28285260508 has 12 divisors (see below), whose sum is σ = 50650350520. Its totient is φ = 13813731792.

The previous prime is 28285260481. The next prime is 28285260517. The reversal of 28285260508 is 80506258282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82224423 + ... + 82224766.

Almost surely, 2^28285260508 is an apocalyptic number.

It is an amenable number.

28285260508 is a deficient number, since it is larger than the sum of its proper divisors (22365090012).

28285260508 is a wasteful number, since it uses less digits than its factorization.

28285260508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164449236 (or 164449234 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 28285260508 in words is "twenty-eight billion, two hundred eighty-five million, two hundred sixty thousand, five hundred eight".