28172379910756 has 9 divisors (see below), whose sum is σ = 49301683421011. Its totient is φ = 14086184647612.

The previous prime is 28172379910721. The next prime is 28172379910841. The reversal of 28172379910756 is 65701997327182.

The square root of 28172379910756 is 5307766.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28172379910691 and 28172379910700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9288591 + ... + 11942473.

Almost surely, 2^{28172379910756} is an apocalyptic number.

28172379910756 is the 5307766-th square number.

It is an amenable number.

28172379910756 is a deficient number, since it is larger than the sum of its proper divisors (21129303510255).

28172379910756 is an frugal number, since it uses more digits than its factorization.

28172379910756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5307770 (or 2653885 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 67.

The spelling of 28172379910756 in words is "twenty-eight trillion, one hundred seventy-two billion, three hundred seventy-nine million, nine hundred ten thousand, seven hundred fifty-six".