28676917 has 4 divisors (see below), whose sum is σ = 29376396. Its totient is φ = 27977440.

The previous prime is 28676903. The next prime is 28676927. The reversal of 28676917 is 71967682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71967682 = 2 ⋅35983841.

It can be written as a sum of positive squares in 2 ways, for example, as 13003236 + 15673681 = 3606^2 + 3959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28676917 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 (28676927) 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, 349678 + ... + 349759.

It is an arithmetic number, because the mean of its divisors is an integer number (7344099).

Almost surely, 2^28676917 is an apocalyptic number.

It is an amenable number.

28676917 is a deficient number, since it is larger than the sum of its proper divisors (699479).

28676917 is an equidigital number, since it uses as much as digits as its factorization.

28676917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699478.

The product of its digits is 254016, while the sum is 46.

The square root of 28676917 is about 5355.0832860003. The cubic root of 28676917 is about 306.0864843050.

The spelling of 28676917 in words is "twenty-eight million, six hundred seventy-six thousand, nine hundred seventeen".