398324889 has 12 divisors (see below), whose sum is σ = 595198500. Its totient is φ = 256392864.

The previous prime is 398324827. The next prime is 398324891. The reversal of 398324889 is 988423893.

It is a happy number.

398324889 is a `hidden beast` number, since 398 + 3 + 248 + 8 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64641600 + 333683289 = 8040^2 + 18267^2 .

It is not a de Polignac number, because 398324889 - 2⁷ = 398324761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398224889) 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 11 ways as a sum of consecutive naturals, for example, 762814 + ... + 763335.

It is an arithmetic number, because the mean of its divisors is an integer number (49599875).

Almost surely, 2^398324889 is an apocalyptic number.

It is an amenable number.

398324889 is a deficient number, since it is larger than the sum of its proper divisors (196873611).

398324889 is a wasteful number, since it uses less digits than its factorization.

398324889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526184 (or 1526181 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 398324889 is about 19958.0782892542. The cubic root of 398324889 is about 735.7763336831.

The spelling of 398324889 in words is "three hundred ninety-eight million, three hundred twenty-four thousand, eight hundred eighty-nine".