28616689 has 8 divisors (see below), whose sum is σ = 29699072. Its totient is φ = 27544320.

The previous prime is 28616683. The next prime is 28616701. The reversal of 28616689 is 98661682.

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 28616689 - 2⁹ = 28616177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28616683) 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, 3592 + ... + 8374.

It is an arithmetic number, because the mean of its divisors is an integer number (3712384).

Almost surely, 2^28616689 is an apocalyptic number.

It is an amenable number.

28616689 is a deficient number, since it is larger than the sum of its proper divisors (1082383).

28616689 is a wasteful number, since it uses less digits than its factorization.

28616689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5007.

The product of its digits is 248832, while the sum is 46.

The square root of 28616689 is about 5349.4568883205. The cubic root of 28616689 is about 305.8720505413.

The spelling of 28616689 in words is "twenty-eight million, six hundred sixteen thousand, six hundred eighty-nine".