28863289 has 8 divisors (see below), whose sum is σ = 35524160. Its totient is φ = 22836816.

The previous prime is 28863287. The next prime is 28863371. The reversal of 28863289 is 98236882.

It is a happy number.

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 28863289 - 2¹ = 28863287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28863281) 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, 158499 + ... + 158680.

It is an arithmetic number, because the mean of its divisors is an integer number (4440520).

Almost surely, 2^28863289 is an apocalyptic number.

It is an amenable number.

28863289 is a deficient number, since it is larger than the sum of its proper divisors (6660871).

28863289 is a wasteful number, since it uses less digits than its factorization.

28863289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317199.

The product of its digits is 331776, while the sum is 46.

The square root of 28863289 is about 5372.4565144820. The cubic root of 28863289 is about 306.7481408969.

The spelling of 28863289 in words is "twenty-eight million, eight hundred sixty-three thousand, two hundred eighty-nine".