28968239 has 8 divisors (see below), whose sum is σ = 29311200. Its totient is φ = 28627456.

The previous prime is 28968223. The next prime is 28968241. The reversal of 28968239 is 93286982.

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 28968239 - 2⁴ = 28968223 is a prime.

It is a super-2 number, since 2×28968239² = 1678317741522242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28968193 and 28968202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28968139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48062 + ... + 48660.

It is an arithmetic number, because the mean of its divisors is an integer number (3663900).

Almost surely, 2^28968239 is an apocalyptic number.

28968239 is a deficient number, since it is larger than the sum of its proper divisors (342961).

28968239 is a wasteful number, since it uses less digits than its factorization.

28968239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089.

The product of its digits is 373248, while the sum is 47.

The square root of 28968239 is about 5382.2150644507. The cubic root of 28968239 is about 307.1194808447.

The spelling of 28968239 in words is "twenty-eight million, nine hundred sixty-eight thousand, two hundred thirty-nine".