28385547065 has 8 divisors (see below), whose sum is σ = 34084514880. Its totient is φ = 22693865392.

The previous prime is 28385547011. The next prime is 28385547089. The reversal of 28385547065 is 56074558382.

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 28385547065 - 2¹⁶ = 28385481529 is a prime.

It is a super-2 number, since 2×28385547065² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28385546998 and 28385547016.

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, 1812959 + ... + 1828548.

It is an arithmetic number, because the mean of its divisors is an integer number (4260564360).

Almost surely, 2^28385547065 is an apocalyptic number.

It is an amenable number.

28385547065 is a deficient number, since it is larger than the sum of its proper divisors (5698967815).

28385547065 is a wasteful number, since it uses less digits than its factorization.

28385547065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643071.

The product of its (nonzero) digits is 8064000, while the sum is 53.

The spelling of 28385547065 in words is "twenty-eight billion, three hundred eighty-five million, five hundred forty-seven thousand, sixty-five".