28928897 has 2 divisors, whose sum is σ = 28928898. Its totient is φ = 28928896.

The previous prime is 28928891. The next prime is 28928941. The reversal of 28928897 is 79882982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24049216 + 4879681 = 4904^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 28928897 - 2⁶ = 28928833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28928891) 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, 14464448 + 14464449.

It is an arithmetic number, because the mean of its divisors is an integer number (14464449).

Almost surely, 2^28928897 is an apocalyptic number.

It is an amenable number.

28928897 is a deficient number, since it is larger than the sum of its proper divisors (1).

28928897 is an equidigital number, since it uses as much as digits as its factorization.

28928897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 53.

The square root of 28928897 is about 5378.5590077641. The cubic root of 28928897 is about 306.9803840381.

The spelling of 28928897 in words is "twenty-eight million, nine hundred twenty-eight thousand, eight hundred ninety-seven".