28124339 has 2 divisors, whose sum is σ = 28124340. Its totient is φ = 28124338.

The previous prime is 28124333. The next prime is 28124357. The reversal of 28124339 is 93342182.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28124339 - 2¹⁶ = 28058803 is a prime.

It is not a weakly prime, because it can be changed into another prime (28124333) 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 as a sum of consecutive naturals, namely, 14062169 + 14062170.

It is an arithmetic number, because the mean of its divisors is an integer number (14062170).

Almost surely, 2^28124339 is an apocalyptic number.

28124339 is a deficient number, since it is larger than the sum of its proper divisors (1).

28124339 is an equidigital number, since it uses as much as digits as its factorization.

28124339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 28124339 is about 5303.2385388553. The cubic root of 28124339 is about 304.1077173390.

The spelling of 28124339 in words is "twenty-eight million, one hundred twenty-four thousand, three hundred thirty-nine".