398415 has 8 divisors (see below), whose sum is σ = 637488. Its totient is φ = 212480.

The previous prime is 398407. The next prime is 398417. The reversal of 398415 is 514893.

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

It is not a de Polignac number, because 398415 - 2³ = 398407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398417) 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, 13266 + ... + 13295.

It is an arithmetic number, because the mean of its divisors is an integer number (79686).

2³⁹⁸⁴¹⁵ is an apocalyptic number.

398415 is a deficient number, since it is larger than the sum of its proper divisors (239073).

398415 is a wasteful number, since it uses less digits than its factorization.

398415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26569.

The product of its digits is 4320, while the sum is 30.

The square root of 398415 is about 631.2012357402. The cubic root of 398415 is about 73.5831813137.

The spelling of 398415 in words is "three hundred ninety-eight thousand, four hundred fifteen".