398873 has 4 divisors (see below), whose sum is σ = 401700. Its totient is φ = 396048.

The previous prime is 398863. The next prime is 398887. The reversal of 398873 is 378893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23104 + 375769 = 152^2 + 613^2 .

It is a cyclic number.

It is not a de Polignac number, because 398873 - 2⁴ = 398857 is a prime.

It is a Duffinian number.

It is a Curzon 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, 1190 + ... + 1487.

It is an arithmetic number, because the mean of its divisors is an integer number (100425).

2³⁹⁸⁸⁷³ is an apocalyptic number.

It is an amenable number.

398873 is a deficient number, since it is larger than the sum of its proper divisors (2827).

398873 is a wasteful number, since it uses less digits than its factorization.

398873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826.

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

The square root of 398873 is about 631.5639318390. The cubic root of 398873 is about 73.6113664904.

The spelling of 398873 in words is "three hundred ninety-eight thousand, eight hundred seventy-three".