28048939 has 2 divisors, whose sum is σ = 28048940. Its totient is φ = 28048938.

The previous prime is 28048931. The next prime is 28048967. The reversal of 28048939 is 93984082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28048939 - 2³ = 28048931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28048895 and 28048904.

It is not a weakly prime, because it can be changed into another prime (28048931) 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 as a sum of consecutive naturals, namely, 14024469 + 14024470.

It is an arithmetic number, because the mean of its divisors is an integer number (14024470).

Almost surely, 2^28048939 is an apocalyptic number.

28048939 is a deficient number, since it is larger than the sum of its proper divisors (1).

28048939 is an equidigital number, since it uses as much as digits as its factorization.

28048939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 28048939 is about 5296.1249041162. The cubic root of 28048939 is about 303.8357080588.

The spelling of 28048939 in words is "twenty-eight million, forty-eight thousand, nine hundred thirty-nine".