398575 has 12 divisors (see below), whose sum is σ = 502200. Its totient is φ = 313760.

The previous prime is 398569. The next prime is 398581. The reversal of 398575 is 575893.

It is an interprime number because it is at equal distance from previous prime (398569) and next prime (398581).

It is not a de Polignac number, because 398575 - 2⁵ = 398543 is a prime.

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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2601 + ... + 2749.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2³⁹⁸⁵⁷⁵ is an apocalyptic number.

398575 is a deficient number, since it is larger than the sum of its proper divisors (103625).

398575 is a wasteful number, since it uses less digits than its factorization.

398575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 261 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 398575 is about 631.3279654823. The cubic root of 398575 is about 73.5930301174.

The spelling of 398575 in words is "three hundred ninety-eight thousand, five hundred seventy-five".