28011664135 has 24 divisors (see below), whose sum is σ = 42109847136. Its totient is φ = 17730457920.

The previous prime is 28011664123. The next prime is 28011664141. The reversal of 28011664135 is 53146611082.

It is a happy number.

It is not a de Polignac number, because 28011664135 - 2⁵ = 28011664103 is a prime.

It is a super-2 number, since 2×28011664135² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28011664094 and 28011664103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4394251 + ... + 4400620.

It is an arithmetic number, because the mean of its divisors is an integer number (1754576964).

Almost surely, 2^28011664135 is an apocalyptic number.

28011664135 is a deficient number, since it is larger than the sum of its proper divisors (14098183001).

28011664135 is a wasteful number, since it uses less digits than its factorization.

28011664135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8794903 (or 8794896 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 28011664135 in words is "twenty-eight billion, eleven million, six hundred sixty-four thousand, one hundred thirty-five".