398533 has 4 divisors (see below), whose sum is σ = 401580. Its totient is φ = 395488.

The previous prime is 398509. The next prime is 398539. The reversal of 398533 is 335893.

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 294849 + 103684 = 543^2 + 322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398533 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398495 and 398504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398539) 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, 1318 + ... + 1591.

It is an arithmetic number, because the mean of its divisors is an integer number (100395).

2³⁹⁸⁵³³ is an apocalyptic number.

It is an amenable number.

398533 is a deficient number, since it is larger than the sum of its proper divisors (3047).

398533 is a wasteful number, since it uses less digits than its factorization.

398533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046.

The product of its digits is 9720, while the sum is 31.

The square root of 398533 is about 631.2947013876. The cubic root of 398533 is about 73.5904450616.

The spelling of 398533 in words is "three hundred ninety-eight thousand, five hundred thirty-three".