28691569084 has 12 divisors (see below), whose sum is σ = 50727877984. Its totient is φ = 14197889664.

The previous prime is 28691569073. The next prime is 28691569163. The reversal of 28691569084 is 48096519682.

It is a super-2 number, since 2×28691569084² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 36973284 + ... + 36974059.

Almost surely, 2^28691569084 is an apocalyptic number.

It is an amenable number.

28691569084 is a deficient number, since it is larger than the sum of its proper divisors (22036308900).

28691569084 is a wasteful number, since it uses less digits than its factorization.

28691569084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73947444 (or 73947442 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 28691569084 in words is "twenty-eight billion, six hundred ninety-one million, five hundred sixty-nine thousand, eighty-four".