28339811 has 8 divisors (see below), whose sum is σ = 30140880. Its totient is φ = 26569728.

The previous prime is 28339781. The next prime is 28339813. The reversal of 28339811 is 11893382.

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 28339811 - 2⁶ = 28339747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28339813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5846 + ... + 9531.

It is an arithmetic number, because the mean of its divisors is an integer number (3767610).

Almost surely, 2^28339811 is an apocalyptic number.

28339811 is a deficient number, since it is larger than the sum of its proper divisors (1801069).

28339811 is a wasteful number, since it uses less digits than its factorization.

28339811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15493.

The product of its digits is 10368, while the sum is 35.

The square root of 28339811 is about 5323.5149102825. The cubic root of 28339811 is about 304.8823733464.

The spelling of 28339811 in words is "twenty-eight million, three hundred thirty-nine thousand, eight hundred eleven".