28512872 has 16 divisors (see below), whose sum is σ = 53982240. Its totient is φ = 14117616.

The previous prime is 28512853. The next prime is 28512881. The reversal of 28512872 is 27821582.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16478 + ... + 18125.

It is an arithmetic number, because the mean of its divisors is an integer number (3373890).

Almost surely, 2^28512872 is an apocalyptic number.

It is an amenable number.

28512872 is a deficient number, since it is larger than the sum of its proper divisors (25469368).

28512872 is a wasteful number, since it uses less digits than its factorization.

28512872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34712 (or 34708 counting only the distinct ones).

The product of its digits is 17920, while the sum is 35.

The square root of 28512872 is about 5339.7445631790. The cubic root of 28512872 is about 305.5017165649.

The spelling of 28512872 in words is "twenty-eight million, five hundred twelve thousand, eight hundred seventy-two".