28204499812 has 12 divisors (see below), whose sum is σ = 49372531516. Its totient is φ = 14098062240.

The previous prime is 28204499797. The next prime is 28204499837. The reversal of 28204499812 is 21899440282.

It can be written as a sum of positive squares in 2 ways, for example, as 21384382756 + 6820117056 = 146234^2 + 82584^2 .

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, 1031739 + ... + 1058722.

Almost surely, 2^28204499812 is an apocalyptic number.

It is an amenable number.

28204499812 is a deficient number, since it is larger than the sum of its proper divisors (21168031704).

28204499812 is a wasteful number, since it uses less digits than its factorization.

28204499812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093838 (or 2093836 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 28204499812 in words is "twenty-eight billion, two hundred four million, four hundred ninety-nine thousand, eight hundred twelve".