398285289 has 8 divisors (see below), whose sum is σ = 590052320. Its totient is φ = 265523508.

The previous prime is 398285269. The next prime is 398285291. The reversal of 398285289 is 982582893.

398285289 is a `hidden beast` number, since 3 + 98 + 28 + 528 + 9 = 666.

It is not a de Polignac number, because 398285289 - 2⁵ = 398285257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398285219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7375627 + ... + 7375680.

It is an arithmetic number, because the mean of its divisors is an integer number (73756540).

Almost surely, 2^398285289 is an apocalyptic number.

It is an amenable number.

398285289 is a deficient number, since it is larger than the sum of its proper divisors (191767031).

398285289 is a wasteful number, since it uses less digits than its factorization.

398285289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14751316 (or 14751310 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 398285289 is about 19957.0861851123. The cubic root of 398285289 is about 735.7519501466.

The spelling of 398285289 in words is "three hundred ninety-eight million, two hundred eighty-five thousand, two hundred eighty-nine".