28024939 has 2 divisors, whose sum is σ = 28024940. Its totient is φ = 28024938.

The previous prime is 28024937. The next prime is 28024967. The reversal of 28024939 is 93942082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28024939 - 2¹ = 28024937 is a prime.

Together with 28024937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28024898 and 28024907.

It is not a weakly prime, because it can be changed into another prime (28024937) 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, 14012469 + 14012470.

It is an arithmetic number, because the mean of its divisors is an integer number (14012470).

Almost surely, 2^28024939 is an apocalyptic number.

28024939 is a deficient number, since it is larger than the sum of its proper divisors (1).

28024939 is an equidigital number, since it uses as much as digits as its factorization.

28024939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 28024939 is about 5293.8586116367. The cubic root of 28024939 is about 303.7490245923.

The spelling of 28024939 in words is "twenty-eight million, twenty-four thousand, nine hundred thirty-nine".