398839 has 8 divisors (see below), whose sum is σ = 459648. Its totient is φ = 339000.

The previous prime is 398833. The next prime is 398857. The reversal of 398839 is 938893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398839 - 2⁷ = 398711 is a prime.

It is a super-3 number, since 3×398839³ = 190333007820791157, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1464 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (57456).

2³⁹⁸⁸³⁹ is an apocalyptic number.

398839 is a deficient number, since it is larger than the sum of its proper divisors (60809).

398839 is a wasteful number, since it uses less digits than its factorization.

398839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its digits is 46656, while the sum is 40.

The square root of 398839 is about 631.5370139588. The cubic root of 398839 is about 73.6092748827.

The spelling of 398839 in words is "three hundred ninety-eight thousand, eight hundred thirty-nine".