28431079 has 2 divisors, whose sum is σ = 28431080. Its totient is φ = 28431078.

The previous prime is 28431071. The next prime is 28431083. The reversal of 28431079 is 97013482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28431079 - 2³ = 28431071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28431071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14215539 + 14215540.

It is an arithmetic number, because the mean of its divisors is an integer number (14215540).

Almost surely, 2^28431079 is an apocalyptic number.

28431079 is a deficient number, since it is larger than the sum of its proper divisors (1).

28431079 is an equidigital number, since it uses as much as digits as its factorization.

28431079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28431079 is about 5332.0801756913. The cubic root of 28431079 is about 305.2093125614.

The spelling of 28431079 in words is "twenty-eight million, four hundred thirty-one thousand, seventy-nine".