28669117 has 8 divisors (see below), whose sum is σ = 29708856. Its totient is φ = 27643392.

The previous prime is 28669111. The next prime is 28669169. The reversal of 28669117 is 71196682.

It can be written as a sum of positive squares in 4 ways, for example, as 89401 + 28579716 = 299^2 + 5346^2 .

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 28669117 - 2⁷ = 28668989 is a prime.

It is a super-3 number, since 3×28669117³ (a number of 23 digits) contains 333 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 28669117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28669111) 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, 753 + ... + 7609.

It is an arithmetic number, because the mean of its divisors is an integer number (3713607).

Almost surely, 2^28669117 is an apocalyptic number.

It is an amenable number.

28669117 is a deficient number, since it is larger than the sum of its proper divisors (1039739).

28669117 is a wasteful number, since it uses less digits than its factorization.

28669117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007.

The product of its digits is 36288, while the sum is 40.

The square root of 28669117 is about 5354.3549564817. The cubic root of 28669117 is about 306.0587303793.

The spelling of 28669117 in words is "twenty-eight million, six hundred sixty-nine thousand, one hundred seventeen".