28868339 has 4 divisors (see below), whose sum is σ = 29088840. Its totient is φ = 28647840.

The previous prime is 28868327. The next prime is 28868341. The reversal of 28868339 is 93386882.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28868339 - 2⁸ = 28868083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28868293 and 28868302.

It is not an unprimeable number, because it can be changed into a prime (28898339) 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 3 ways as a sum of consecutive naturals, for example, 110054 + ... + 110315.

It is an arithmetic number, because the mean of its divisors is an integer number (7272210).

Almost surely, 2^28868339 is an apocalyptic number.

28868339 is a deficient number, since it is larger than the sum of its proper divisors (220501).

28868339 is a wasteful number, since it uses less digits than its factorization.

28868339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220500.

The product of its digits is 497664, while the sum is 47.

The square root of 28868339 is about 5372.9264837703. The cubic root of 28868339 is about 306.7660296849.

The spelling of 28868339 in words is "twenty-eight million, eight hundred sixty-eight thousand, three hundred thirty-nine".