28512633836 has 12 divisors (see below), whose sum is σ = 52066548912. Its totient is φ = 13636477008.

The previous prime is 28512633829. The next prime is 28512633839. The reversal of 28512633836 is 63833621582.

It is not an unprimeable number, because it can be changed into a prime (28512633839) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 154959875 + ... + 154960058.

It is an arithmetic number, because the mean of its divisors is an integer number (4338879076).

Almost surely, 2^28512633836 is an apocalyptic number.

It is an amenable number.

28512633836 is a deficient number, since it is larger than the sum of its proper divisors (23553915076).

28512633836 is a wasteful number, since it uses less digits than its factorization.

28512633836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309919960 (or 309919958 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The spelling of 28512633836 in words is "twenty-eight billion, five hundred twelve million, six hundred thirty-three thousand, eight hundred thirty-six".