28808159 has 2 divisors, whose sum is σ = 28808160. Its totient is φ = 28808158.

The previous prime is 28808137. The next prime is 28808177. The reversal of 28808159 is 95180882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28808159 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28808189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14404079 + 14404080.

It is an arithmetic number, because the mean of its divisors is an integer number (14404080).

Almost surely, 2^28808159 is an apocalyptic number.

28808159 is a deficient number, since it is larger than the sum of its proper divisors (1).

28808159 is an equidigital number, since it uses as much as digits as its factorization.

28808159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 28808159 is about 5367.3232621112. The cubic root of 28808159 is about 306.5527161441.

The spelling of 28808159 in words is "twenty-eight million, eight hundred eight thousand, one hundred fifty-nine".