28520832867073 has 8 divisors (see below), whose sum is σ = 28624958122280. Its totient is φ = 28416715971840.

The previous prime is 28520832867019. The next prime is 28520832867077. The reversal of 28520832867073 is 37076823802582.

It can be written as a sum of positive squares in 4 ways, for example, as 4413793415409 + 24107039451664 = 2100903^2 + 4909892^2 .

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 28520832867073 - 2²⁵ = 28520799312641 is a prime.

It is a super-2 number, since 2×28520832867073² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28520832867077) by changing a digit.

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, 4786873 + ... + 8941801.

It is an arithmetic number, because the mean of its divisors is an integer number (3578119765285).

Almost surely, 2^{28520832867073} is an apocalyptic number.

It is an amenable number.

28520832867073 is a deficient number, since it is larger than the sum of its proper divisors (104125255207).

28520832867073 is a wasteful number, since it uses less digits than its factorization.

28520832867073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179987.

The product of its (nonzero) digits is 54190080, while the sum is 61.

The spelling of 28520832867073 in words is "twenty-eight trillion, five hundred twenty billion, eight hundred thirty-two million, eight hundred sixty-seven thousand, seventy-three".