28851985816 has 16 divisors (see below), whose sum is σ = 54152521200. Its totient is φ = 14411313504.

The previous prime is 28851985807. The next prime is 28851985847. The reversal of 28851985816 is 61858915882.

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, 1826571 + ... + 1842298.

It is an arithmetic number, because the mean of its divisors is an integer number (3384532575).

Almost surely, 2^28851985816 is an apocalyptic number.

It is an amenable number.

28851985816 is a deficient number, since it is larger than the sum of its proper divisors (25300535384).

28851985816 is a wasteful number, since it uses less digits than its factorization.

28851985816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669858 (or 3669854 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 61.

The spelling of 28851985816 in words is "twenty-eight billion, eight hundred fifty-one million, nine hundred eighty-five thousand, eight hundred sixteen".