28875779 has 2 divisors, whose sum is σ = 28875780. Its totient is φ = 28875778.

The previous prime is 28875773. The next prime is 28875827. The reversal of 28875779 is 97757882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28875779 - 2⁸ = 28875523 is a prime.

It is a super-2 number, since 2×28875779² = 1667621225713682, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28875779.

It is not a weakly prime, because it can be changed into another prime (28875773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14437889 + 14437890.

It is an arithmetic number, because the mean of its divisors is an integer number (14437890).

Almost surely, 2^28875779 is an apocalyptic number.

28875779 is a deficient number, since it is larger than the sum of its proper divisors (1).

28875779 is an equidigital number, since it uses as much as digits as its factorization.

28875779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975680, while the sum is 53.

The square root of 28875779 is about 5373.6187992823. The cubic root of 28875779 is about 306.7923808514.

It can be divided in two parts, 288 and 75779, that added together give a palindrome (76067).

The spelling of 28875779 in words is "twenty-eight million, eight hundred seventy-five thousand, seven hundred seventy-nine".