398893 has 4 divisors (see below), whose sum is σ = 435168. Its totient is φ = 362620.

The previous prime is 398887. The next prime is 398903.

398893 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398893 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18121 + ... + 18142.

It is an arithmetic number, because the mean of its divisors is an integer number (108792).

2³⁹⁸⁸⁹³ is an apocalyptic number.

It is an amenable number.

398893 is a deficient number, since it is larger than the sum of its proper divisors (36275).

398893 is a wasteful number, since it uses less digits than its factorization.

398893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36274.

The product of its digits is 46656, while the sum is 40.

The square root of 398893 is about 631.5797653503. The cubic root of 398893 is about 73.6125967924.

The spelling of 398893 in words is "three hundred ninety-eight thousand, eight hundred ninety-three".