28396716769 has 4 divisors (see below), whose sum is σ = 28756168960. Its totient is φ = 28037264580.

The previous prime is 28396716749. The next prime is 28396716791. The reversal of 28396716769 is 96761769382.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96761769382 = 2 ⋅48380884691.

It is a cyclic number.

It is not a de Polignac number, because 28396716769 - 2⁷ = 28396716641 is a prime.

It is a super-2 number, since 2×28396716769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28396716769.

It is not an unprimeable number, because it can be changed into a prime (28396716749) 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, 179725977 + ... + 179726134.

It is an arithmetic number, because the mean of its divisors is an integer number (7189042240).

Almost surely, 2^28396716769 is an apocalyptic number.

It is an amenable number.

28396716769 is a deficient number, since it is larger than the sum of its proper divisors (359452191).

28396716769 is an equidigital number, since it uses as much as digits as its factorization.

28396716769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359452190.

The product of its digits is 41150592, while the sum is 64.

The spelling of 28396716769 in words is "twenty-eight billion, three hundred ninety-six million, seven hundred sixteen thousand, seven hundred sixty-nine".