28663692317 has 8 divisors (see below), whose sum is σ = 30891872256. Its totient is φ = 26438838192.

The previous prime is 28663692311. The next prime is 28663692329. The reversal of 28663692317 is 71329636682.

It is a happy number.

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

It is not a de Polignac number, because 28663692317 - 2²⁶ = 28596583453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28663692311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813533 + ... + 848034.

It is an arithmetic number, because the mean of its divisors is an integer number (3861484032).

Almost surely, 2^28663692317 is an apocalyptic number.

It is an amenable number.

28663692317 is a deficient number, since it is larger than the sum of its proper divisors (2228179939).

28663692317 is a wasteful number, since it uses less digits than its factorization.

28663692317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662907.

The product of its digits is 3919104, while the sum is 53.

The spelling of 28663692317 in words is "twenty-eight billion, six hundred sixty-three million, six hundred ninety-two thousand, three hundred seventeen".