398834 has 4 divisors (see below), whose sum is σ = 598254. Its totient is φ = 199416.

The previous prime is 398833. The next prime is 398857. The reversal of 398834 is 438893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 305809 + 93025 = 553^2 + 305^2 .

It is a junction number, because it is equal to n+sod(n) for n = 398794 and 398803.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398834.

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 as a sum of consecutive naturals, namely, 99707 + ... + 99710.

2³⁹⁸⁸³⁴ is an apocalyptic number.

398834 is a deficient number, since it is larger than the sum of its proper divisors (199420).

398834 is a wasteful number, since it uses less digits than its factorization.

398834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199419.

The product of its digits is 20736, while the sum is 35.

The square root of 398834 is about 631.5330553502. The cubic root of 398834 is about 73.6089672833.

The spelling of 398834 in words is "three hundred ninety-eight thousand, eight hundred thirty-four".