398584389 has 16 divisors (see below), whose sum is σ = 611098112. Its totient is φ = 226363248.

The previous prime is 398584379. The next prime is 398584423. The reversal of 398584389 is 983485893.

It is not a de Polignac number, because 398584389 - 2¹² = 398580293 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 (398584369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54799 + ... + 61644.

It is an arithmetic number, because the mean of its divisors is an integer number (38193632).

Almost surely, 2^398584389 is an apocalyptic number.

It is an amenable number.

398584389 is a deficient number, since it is larger than the sum of its proper divisors (212513723).

398584389 is a wasteful number, since it uses less digits than its factorization.

398584389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116616.

The product of its digits is 7464960, while the sum is 57.

The square root of 398584389 is about 19964.5783576814. The cubic root of 398584389 is about 735.9360797562.

The spelling of 398584389 in words is "three hundred ninety-eight million, five hundred eighty-four thousand, three hundred eighty-nine".