28809371135 has 4 divisors (see below), whose sum is σ = 34571245368. Its totient is φ = 23047496904.

The previous prime is 28809371117. The next prime is 28809371141. The reversal of 28809371135 is 53117390882.

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

It is a cyclic number.

It is not a de Polignac number, because 28809371135 - 2¹⁰ = 28809370111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28809371135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2880937109 + ... + 2880937118.

It is an arithmetic number, because the mean of its divisors is an integer number (8642811342).

Almost surely, 2^28809371135 is an apocalyptic number.

28809371135 is a deficient number, since it is larger than the sum of its proper divisors (5761874233).

28809371135 is an equidigital number, since it uses as much as digits as its factorization.

28809371135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5761874232.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 28809371135 in words is "twenty-eight billion, eight hundred nine million, three hundred seventy-one thousand, one hundred thirty-five".