28509296011 has 16 divisors (see below), whose sum is σ = 32834206720. Its totient is φ = 24247615680.

The previous prime is 28509295963. The next prime is 28509296201. The reversal of 28509296011 is 11069290582.

It is a cyclic number.

It is not a de Polignac number, because 28509296011 - 2¹⁷ = 28509164939 is a prime.

It is a super-3 number, since 3×28509296011³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28509296611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2072446 + ... + 2086156.

It is an arithmetic number, because the mean of its divisors is an integer number (2052137920).

Almost surely, 2^28509296011 is an apocalyptic number.

28509296011 is a deficient number, since it is larger than the sum of its proper divisors (4324910709).

28509296011 is a wasteful number, since it uses less digits than its factorization.

28509296011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15994.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 28509296011 in words is "twenty-eight billion, five hundred nine million, two hundred ninety-six thousand, eleven".