28877546669 has 4 divisors (see below), whose sum is σ = 29054709696. Its totient is φ = 28700383644.

The previous prime is 28877546657. The next prime is 28877546671. The reversal of 28877546669 is 96664577882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28877546669 - 2⁸ = 28877546413 is a prime.

It is a super-2 number, since 2×28877546669² (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 = 28877546599 and 28877546608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877546609) by changing a digit.

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, 88581269 + ... + 88581594.

It is an arithmetic number, because the mean of its divisors is an integer number (7263677424).

Almost surely, 2^28877546669 is an apocalyptic number.

It is an amenable number.

28877546669 is a deficient number, since it is larger than the sum of its proper divisors (177163027).

28877546669 is a wasteful number, since it uses less digits than its factorization.

28877546669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177163026.

The product of its digits is 243855360, while the sum is 68.

The spelling of 28877546669 in words is "twenty-eight billion, eight hundred seventy-seven million, five hundred forty-six thousand, six hundred sixty-nine".