398519989 has 12 divisors (see below), whose sum is σ = 463971564. Its totient is φ = 341303424.

The previous prime is 398519983. The next prime is 398519999. The reversal of 398519989 is 989915893.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 186322500 + 212197489 = 13650^2 + 14567^2 .

It is not a de Polignac number, because 398519989 - 2⁷ = 398519861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398519983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73479 + ... + 78715.

It is an arithmetic number, because the mean of its divisors is an integer number (38664297).

Almost surely, 2^398519989 is an apocalyptic number.

It is an amenable number.

398519989 is a deficient number, since it is larger than the sum of its proper divisors (65451575).

398519989 is a wasteful number, since it uses less digits than its factorization.

398519989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804 (or 6797 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 61.

The square root of 398519989 is about 19962.9654360268. The cubic root of 398519989 is about 735.8964421139.

The spelling of 398519989 in words is "three hundred ninety-eight million, five hundred nineteen thousand, nine hundred eighty-nine".