28676289 has 8 divisors (see below), whose sum is σ = 38719360. Its totient is φ = 18875376.

The previous prime is 28676287. The next prime is 28676299. The reversal of 28676289 is 98267682.

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 28676289 - 2¹ = 28676287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28676287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60262 + ... + 60735.

It is an arithmetic number, because the mean of its divisors is an integer number (4839920).

Almost surely, 2^28676289 is an apocalyptic number.

It is an amenable number.

28676289 is a deficient number, since it is larger than the sum of its proper divisors (10043071).

28676289 is a wasteful number, since it uses less digits than its factorization.

28676289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121079.

The product of its digits is 580608, while the sum is 48.

The square root of 28676289 is about 5355.0246498032. The cubic root of 28676289 is about 306.0842499444.

The spelling of 28676289 in words is "twenty-eight million, six hundred seventy-six thousand, two hundred eighty-nine".