28439323 has 8 divisors (see below), whose sum is σ = 31610736. Its totient is φ = 25365600.

The previous prime is 28439309. The next prime is 28439329. The reversal of 28439323 is 32393482.

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 28439323 - 2⁵ = 28439291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28439329) 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, 23808 + ... + 24973.

It is an arithmetic number, because the mean of its divisors is an integer number (3951342).

Almost surely, 2^28439323 is an apocalyptic number.

28439323 is a deficient number, since it is larger than the sum of its proper divisors (3171413).

28439323 is a wasteful number, since it uses less digits than its factorization.

28439323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48845.

The product of its digits is 31104, while the sum is 34.

The square root of 28439323 is about 5332.8531763025. The cubic root of 28439323 is about 305.2388096529.

The spelling of 28439323 in words is "twenty-eight million, four hundred thirty-nine thousand, three hundred twenty-three".