28385648767 has 4 divisors (see below), whose sum is σ = 32440741456. Its totient is φ = 24330556080.

The previous prime is 28385648741. The next prime is 28385648771. The reversal of 28385648767 is 76784658382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76784658382 = 2 ⋅38392329191.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28385648767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28385648699 and 28385648708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28385649767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2027546334 + ... + 2027546347.

It is an arithmetic number, because the mean of its divisors is an integer number (8110185364).

Almost surely, 2^28385648767 is an apocalyptic number.

28385648767 is a deficient number, since it is larger than the sum of its proper divisors (4055092689).

28385648767 is an equidigital number, since it uses as much as digits as its factorization.

28385648767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055092688.

The product of its digits is 108380160, while the sum is 64.

The spelling of 28385648767 in words is "twenty-eight billion, three hundred eighty-five million, six hundred forty-eight thousand, seven hundred sixty-seven".