28642534012 has 24 divisors (see below), whose sum is σ = 50842360800. Its totient is φ = 14116240320.

The previous prime is 28642534009. The next prime is 28642534043. The reversal of 28642534012 is 21043524682.

It is a super-2 number, since 2×28642534012² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1569114 + ... + 1587262.

It is an arithmetic number, because the mean of its divisors is an integer number (2118431700).

Almost surely, 2^28642534012 is an apocalyptic number.

It is an amenable number.

28642534012 is a deficient number, since it is larger than the sum of its proper divisors (22199826788).

28642534012 is a wasteful number, since it uses less digits than its factorization.

28642534012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23781 (or 23779 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 28642534012 in words is "twenty-eight billion, six hundred forty-two million, five hundred thirty-four thousand, twelve".