28718967 has 8 divisors (see below), whose sum is σ = 40544496. Its totient is φ = 18019712.

The previous prime is 28718959. The next prime is 28718971. The reversal of 28718967 is 76981782.

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 28718967 - 2³ = 28718959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28718167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281508 + ... + 281609.

It is an arithmetic number, because the mean of its divisors is an integer number (5068062).

Almost surely, 2^28718967 is an apocalyptic number.

28718967 is a deficient number, since it is larger than the sum of its proper divisors (11825529).

28718967 is a wasteful number, since it uses less digits than its factorization.

28718967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563137.

The product of its digits is 338688, while the sum is 48.

The square root of 28718967 is about 5359.0080238790. The cubic root of 28718967 is about 306.2360197977.

The spelling of 28718967 in words is "twenty-eight million, seven hundred eighteen thousand, nine hundred sixty-seven".