28108368968 has 8 divisors (see below), whose sum is σ = 52703191830. Its totient is φ = 14054184480.

The previous prime is 28108368919. The next prime is 28108368971. The reversal of 28108368968 is 86986380182.

It can be written as a sum of positive squares in only one way, i.e., 27641722564 + 466646404 = 166258^2 + 21602^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1756773053 + ... + 1756773068.

Almost surely, 2^28108368968 is an apocalyptic number.

It is an amenable number.

28108368968 is a deficient number, since it is larger than the sum of its proper divisors (24594822862).

28108368968 is a wasteful number, since it uses less digits than its factorization.

28108368968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513546127 (or 3513546123 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 59.

The spelling of 28108368968 in words is "twenty-eight billion, one hundred eight million, three hundred sixty-eight thousand, nine hundred sixty-eight".