28985206265 has 4 divisors (see below), whose sum is σ = 34782247524. Its totient is φ = 23188165008.

The previous prime is 28985206253. The next prime is 28985206277. The reversal of 28985206265 is 56260258982.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28985206253) and next prime (28985206277).

It can be written as a sum of positive squares in 2 ways, for example, as 4980971776 + 24004234489 = 70576^2 + 154933^2 .

It is a cyclic number.

It is not a de Polignac number, because 28985206265 - 2⁸ = 28985206009 is a prime.

It is a super-3 number, since 3×28985206265³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 2898520622 + ... + 2898520631.

It is an arithmetic number, because the mean of its divisors is an integer number (8695561881).

Almost surely, 2^28985206265 is an apocalyptic number.

It is an amenable number.

28985206265 is a deficient number, since it is larger than the sum of its proper divisors (5797041259).

28985206265 is an equidigital number, since it uses as much as digits as its factorization.

28985206265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5797041258.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 28985206265 in words is "twenty-eight billion, nine hundred eighty-five million, two hundred six thousand, two hundred sixty-five".