28135228851 has 16 divisors (see below), whose sum is σ = 41704220800. Its totient is φ = 18746739144.

The previous prime is 28135228841. The next prime is 28135228853. The reversal of 28135228851 is 15882253182.

It is not a de Polignac number, because 28135228851 - 2⁵ = 28135228819 is a prime.

It is a super-2 number, since 2×28135228851² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28135228797 and 28135228806.

It is not an unprimeable number, because it can be changed into a prime (28135228853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228661 + ... + 329478.

It is an arithmetic number, because the mean of its divisors is an integer number (2606513800).

Almost surely, 2^28135228851 is an apocalyptic number.

28135228851 is a deficient number, since it is larger than the sum of its proper divisors (13568991949).

28135228851 is a wasteful number, since it uses less digits than its factorization.

28135228851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560015 (or 560009 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The spelling of 28135228851 in words is "twenty-eight billion, one hundred thirty-five million, two hundred twenty-eight thousand, eight hundred fifty-one".