28439927 has 8 divisors (see below), whose sum is σ = 29420160. Its totient is φ = 27463680.

The previous prime is 28439911. The next prime is 28439951. The reversal of 28439927 is 72993482.

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 28439927 - 2⁴ = 28439911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28439977) 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, 23243 + ... + 24435.

It is an arithmetic number, because the mean of its divisors is an integer number (3677520).

Almost surely, 2^28439927 is an apocalyptic number.

28439927 is a deficient number, since it is larger than the sum of its proper divisors (980233).

28439927 is a wasteful number, since it uses less digits than its factorization.

28439927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993.

The product of its digits is 217728, while the sum is 44.

The square root of 28439927 is about 5332.9098061002. The cubic root of 28439927 is about 305.2409705451.

The spelling of 28439927 in words is "twenty-eight million, four hundred thirty-nine thousand, nine hundred twenty-seven".