398895 has 32 divisors (see below), whose sum is σ = 760320. Its totient is φ = 174720.

The previous prime is 398887. The next prime is 398903. The reversal of 398895 is 598893.

It is an interprime number because it is at equal distance from previous prime (398887) and next prime (398903).

It is not a de Polignac number, because 398895 - 2³ = 398887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2980 + ... + 3110.

It is an arithmetic number, because the mean of its divisors is an integer number (23760).

2³⁹⁸⁸⁹⁵ is an apocalyptic number.

398895 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

398895 is a deficient number, since it is larger than the sum of its proper divisors (361425).

398895 is a wasteful number, since it uses less digits than its factorization.

398895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175.

The product of its digits is 77760, while the sum is 42.

The square root of 398895 is about 631.5813486796. The cubic root of 398895 is about 73.6127198203.

The spelling of 398895 in words is "three hundred ninety-eight thousand, eight hundred ninety-five".