28490236168 has 8 divisors (see below), whose sum is σ = 53419192830. Its totient is φ = 14245118080.

The previous prime is 28490236129. The next prime is 28490236213. The reversal of 28490236168 is 86163209482.

It can be written as a sum of positive squares in only one way, i.e., 19449649444 + 9040586724 = 139462^2 + 95082^2 .

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780639753 + ... + 1780639768.

Almost surely, 2^28490236168 is an apocalyptic number.

It is an amenable number.

28490236168 is a deficient number, since it is larger than the sum of its proper divisors (24928956662).

28490236168 is a wasteful number, since it uses less digits than its factorization.

28490236168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561279527 (or 3561279523 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 28490236168 in words is "twenty-eight billion, four hundred ninety million, two hundred thirty-six thousand, one hundred sixty-eight".