28648647969 has 8 divisors (see below), whose sum is σ = 38627390880. Its totient is φ = 18884501856.

The previous prime is 28648647943. The next prime is 28648648031. The reversal of 28648647969 is 96974684682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28648647969 - 2¹² = 28648643873 is a prime.

It is a super-2 number, since 2×28648647969² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28648642969) 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 7 ways as a sum of consecutive naturals, for example, 53648887 + ... + 53649420.

It is an arithmetic number, because the mean of its divisors is an integer number (4828423860).

Almost surely, 2^28648647969 is an apocalyptic number.

It is an amenable number.

28648647969 is a deficient number, since it is larger than the sum of its proper divisors (9978742911).

28648647969 is a wasteful number, since it uses less digits than its factorization.

28648647969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107298399.

The product of its digits is 250822656, while the sum is 69.

The spelling of 28648647969 in words is "twenty-eight billion, six hundred forty-eight million, six hundred forty-seven thousand, nine hundred sixty-nine".