28727205992 has 16 divisors (see below), whose sum is σ = 53943083460. Its totient is φ = 14342383744.

The previous prime is 28727205973. The next prime is 28727206007. The reversal of 28727205992 is 29950272782.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28694327236 + 32878756 = 169394^2 + 5734^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2646653 + ... + 2657484.

Almost surely, 2^28727205992 is an apocalyptic number.

It is an amenable number.

28727205992 is a deficient number, since it is larger than the sum of its proper divisors (25215877468).

28727205992 is a wasteful number, since it uses less digits than its factorization.

28727205992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5304820 (or 5304816 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 28727205992 in words is "twenty-eight billion, seven hundred twenty-seven million, two hundred five thousand, nine hundred ninety-two".