28662708647 has 8 divisors (see below), whose sum is σ = 30174399360. Its totient is φ = 27151330680.

The previous prime is 28662708623. The next prime is 28662708667. The reversal of 28662708647 is 74680726682.

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

It is a cyclic number.

It is not a de Polignac number, because 28662708647 - 2⁸ = 28662708391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28662708592 and 28662708601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28662708667) 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, 123278 + ... + 269300.

It is an arithmetic number, because the mean of its divisors is an integer number (3771799920).

Almost surely, 2^28662708647 is an apocalyptic number.

28662708647 is a deficient number, since it is larger than the sum of its proper divisors (1511690713).

28662708647 is a wasteful number, since it uses less digits than its factorization.

28662708647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156373.

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 28662708647 in words is "twenty-eight billion, six hundred sixty-two million, seven hundred eight thousand, six hundred forty-seven".