28028005992 has 64 divisors (see below), whose sum is σ = 88977801600. Its totient is φ = 8008001280.

The previous prime is 28028005969. The next prime is 28028006081. The reversal of 28028005992 is 29950082082.

28028005992 is a `hidden beast` number, since 280 + 280 + 0 + 5 + 9 + 92 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9267009 + ... + 9270032.

It is an arithmetic number, because the mean of its divisors is an integer number (1390278150).

Almost surely, 2^28028005992 is an apocalyptic number.

It is an amenable number.

28028005992 is an abundant number, since it is smaller than the sum of its proper divisors (60949795608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28028005992 is a wasteful number, since it uses less digits than its factorization.

28028005992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18537063 (or 18537053 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 28028005992 in words is "twenty-eight billion, twenty-eight million, five thousand, nine hundred ninety-two".