28385774504 has 8 divisors (see below), whose sum is σ = 53223327210. Its totient is φ = 14192887248.

The previous prime is 28385774467. The next prime is 28385774539. The reversal of 28385774504 is 40547758382.

It can be written as a sum of positive squares in only one way, i.e., 19044552004 + 9341222500 = 138002^2 + 96650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1774110899 + ... + 1774110914.

Almost surely, 2^28385774504 is an apocalyptic number.

It is an amenable number.

28385774504 is a deficient number, since it is larger than the sum of its proper divisors (24837552706).

28385774504 is a wasteful number, since it uses less digits than its factorization.

28385774504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3548221819 (or 3548221815 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 53.

The spelling of 28385774504 in words is "twenty-eight billion, three hundred eighty-five million, seven hundred seventy-four thousand, five hundred four".