28171608336 has 135 divisors (see below), whose sum is σ = 80375444773. Its totient is φ = 9211278720.

The previous prime is 28171608307. The next prime is 28171608379. The reversal of 28171608336 is 63380617182.

The square root of 28171608336 is 167844.

It is a perfect power (a square), and thus also a powerful number.

28171608336 is a `hidden beast` number, since 2 + 8 + 1 + 7 + 1 + 608 + 3 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27602499600 + 569108736 = 166140^2 + 23856^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28171608291 and 28171608300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 143002990 + ... + 143003186.

Almost surely, 2^28171608336 is an apocalyptic number.

28171608336 is the 167844-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28171608336

28171608336 is an abundant number, since it is smaller than the sum of its proper divisors (52203836437).

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

28171608336 is an equidigital number, since it uses as much as digits as its factorization.

28171608336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 28171608336 in words is "twenty-eight billion, one hundred seventy-one million, six hundred eight thousand, three hundred thirty-six".