28520704243 has 8 divisors (see below), whose sum is σ = 30023884800. Its totient is φ = 27017732808.

The previous prime is 28520704241. The next prime is 28520704249. The reversal of 28520704243 is 34240702582.

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 28520704243 - 2¹ = 28520704241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28520704241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282798 + ... + 370156.

It is an arithmetic number, because the mean of its divisors is an integer number (3752985600).

Almost surely, 2^28520704243 is an apocalyptic number.

28520704243 is a deficient number, since it is larger than the sum of its proper divisors (1503180557).

28520704243 is a wasteful number, since it uses less digits than its factorization.

28520704243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104561.

The product of its (nonzero) digits is 107520, while the sum is 37.

The spelling of 28520704243 in words is "twenty-eight billion, five hundred twenty million, seven hundred four thousand, two hundred forty-three".