28178825317 has 8 divisors (see below), whose sum is σ = 29027671200. Its totient is φ = 27338776080.

The previous prime is 28178825309. The next prime is 28178825321. The reversal of 28178825317 is 71352887182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28178825317 - 2³ = 28178825309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28178825117) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2192659 + ... + 2205472.

It is an arithmetic number, because the mean of its divisors is an integer number (3628458900).

Almost surely, 2^28178825317 is an apocalyptic number.

It is an amenable number.

28178825317 is a deficient number, since it is larger than the sum of its proper divisors (848845883).

28178825317 is a wasteful number, since it uses less digits than its factorization.

28178825317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398323.

The product of its digits is 1505280, while the sum is 52.

The spelling of 28178825317 in words is "twenty-eight billion, one hundred seventy-eight million, eight hundred twenty-five thousand, three hundred seventeen".