28232404686 has 20 divisors (see below), whose sum is σ = 63261499752. Its totient is φ = 9410801508.

The previous prime is 28232404639. The next prime is 28232404691. The reversal of 28232404686 is 68640423282.

28232404686 is a `hidden beast` number, since 2 + 8 + 232 + 404 + 6 + 8 + 6 = 666.

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 87136890 + ... + 87137213.

Almost surely, 2^28232404686 is an apocalyptic number.

28232404686 is an abundant number, since it is smaller than the sum of its proper divisors (35029095066).

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

28232404686 is a wasteful number, since it uses less digits than its factorization.

28232404686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174274117 (or 174274108 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The spelling of 28232404686 in words is "twenty-eight billion, two hundred thirty-two million, four hundred four thousand, six hundred eighty-six".