28517971145 has 8 divisors (see below), whose sum is σ = 34364753280. Its totient is φ = 22718918320.

The previous prime is 28517971129. The next prime is 28517971151. The reversal of 28517971145 is 54117971582.

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

It is not a de Polignac number, because 28517971145 - 2⁴ = 28517971129 is a prime.

It is a super-2 number, since 2×28517971145² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28517971093 and 28517971102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11931011 + ... + 11933400.

It is an arithmetic number, because the mean of its divisors is an integer number (4295594160).

Almost surely, 2^28517971145 is an apocalyptic number.

It is an amenable number.

28517971145 is a deficient number, since it is larger than the sum of its proper divisors (5846782135).

28517971145 is a wasteful number, since it uses less digits than its factorization.

28517971145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23864655.

The product of its digits is 705600, while the sum is 50.

The spelling of 28517971145 in words is "twenty-eight billion, five hundred seventeen million, nine hundred seventy-one thousand, one hundred forty-five".