398378 has 8 divisors (see below), whose sum is σ = 632772. Its totient is φ = 187456.

The previous prime is 398369. The next prime is 398393. The reversal of 398378 is 873893.

It can be written as a sum of positive squares in 2 ways, for example, as 380689 + 17689 = 617^2 + 133^2 .

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

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5825 + ... + 5892.

2³⁹⁸³⁷⁸ is an apocalyptic number.

398378 is a deficient number, since it is larger than the sum of its proper divisors (234394).

398378 is a wasteful number, since it uses less digits than its factorization.

398378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11736.

The product of its digits is 36288, while the sum is 38.

The square root of 398378 is about 631.1719258649. The cubic root of 398378 is about 73.5809034025.

The spelling of 398378 in words is "three hundred ninety-eight thousand, three hundred seventy-eight".