28339855 has 4 divisors (see below), whose sum is σ = 34007832. Its totient is φ = 22671880.

The previous prime is 28339853. The next prime is 28339879. The reversal of 28339855 is 55893382.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28339855 - 2¹ = 28339853 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 (28339853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2833981 + ... + 2833990.

It is an arithmetic number, because the mean of its divisors is an integer number (8501958).

Almost surely, 2^28339855 is an apocalyptic number.

28339855 is a deficient number, since it is larger than the sum of its proper divisors (5667977).

28339855 is an equidigital number, since it uses as much as digits as its factorization.

28339855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5667976.

The product of its digits is 259200, while the sum is 43.

The square root of 28339855 is about 5323.5190428888. The cubic root of 28339855 is about 304.8825311318.

The spelling of 28339855 in words is "twenty-eight million, three hundred thirty-nine thousand, eight hundred fifty-five".