298225809 has 60 divisors (see below), whose sum is σ = 517501556. Its totient is φ = 165364416.

The previous prime is 298225801. The next prime is 298225813. The reversal of 298225809 is 908522892.

It can be written as a sum of positive squares in 2 ways, for example, as 220433409 + 77792400 = 14847^2 + 8820^2 .

It is not a de Polignac number, because 298225809 - 2³ = 298225801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298225801) 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 in 59 ways as a sum of consecutive naturals, for example, 799347 + ... + 799719.

Almost surely, 2^298225809 is an apocalyptic number.

It is an amenable number.

298225809 is a deficient number, since it is larger than the sum of its proper divisors (219275747).

298225809 is an equidigital number, since it uses as much as digits as its factorization.

298225809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 298225809 is about 17269.2156451878. The cubic root of 298225809 is about 668.1106712125.

The spelling of 298225809 in words is "two hundred ninety-eight million, two hundred twenty-five thousand, eight hundred nine".