28368439 has 8 divisors (see below), whose sum is σ = 31472640. Its totient is φ = 25351800.

The previous prime is 28368437. The next prime is 28368469. The reversal of 28368439 is 93486382.

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 28368439 - 2¹ = 28368437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28368395 and 28368404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28368437) 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, 21207 + ... + 22504.

It is an arithmetic number, because the mean of its divisors is an integer number (3934080).

Almost surely, 2^28368439 is an apocalyptic number.

28368439 is a deficient number, since it is larger than the sum of its proper divisors (3104201).

28368439 is a wasteful number, since it uses less digits than its factorization.

28368439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43781.

The product of its digits is 248832, while the sum is 43.

The square root of 28368439 is about 5326.2030565873. The cubic root of 28368439 is about 304.9849997102.

The spelling of 28368439 in words is "twenty-eight million, three hundred sixty-eight thousand, four hundred thirty-nine".