28682028681 has 16 divisors (see below), whose sum is σ = 38308143360. Its totient is φ = 19088663040.

The previous prime is 28682028679. The next prime is 28682028751. The reversal of 28682028681 is 18682028682.

It is not a de Polignac number, because 28682028681 - 2¹ = 28682028679 is a prime.

It is a super-2 number, since 2×28682028681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28682029681) 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, 7442151 + ... + 7446003.

It is an arithmetic number, because the mean of its divisors is an integer number (2394258960).

Almost surely, 2^28682028681 is an apocalyptic number.

It is an amenable number.

28682028681 is a deficient number, since it is larger than the sum of its proper divisors (9626114679).

28682028681 is a wasteful number, since it uses less digits than its factorization.

28682028681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7456.

The product of its (nonzero) digits is 1179648, while the sum is 51.

Subtracting from 28682028681 its reverse (18682028682), we obtain a palindrome (9999999999).

The spelling of 28682028681 in words is "twenty-eight billion, six hundred eighty-two million, twenty-eight thousand, six hundred eighty-one".