398263 has 4 divisors (see below), whose sum is σ = 399600. Its totient is φ = 396928.

The previous prime is 398261. The next prime is 398267. The reversal of 398263 is 362893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 362893 = 101 ⋅3593.

It is a cyclic number.

It is not a de Polignac number, because 398263 - 2¹ = 398261 is a prime.

It is a super-2 number, since 2×398263² = 317226834338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398261) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6 + ... + 892.

It is an arithmetic number, because the mean of its divisors is an integer number (99900).

2³⁹⁸²⁶³ is an apocalyptic number.

398263 is a deficient number, since it is larger than the sum of its proper divisors (1337).

398263 is an equidigital number, since it uses as much as digits as its factorization.

398263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336.

The product of its digits is 7776, while the sum is 31.

The square root of 398263 is about 631.0808189131. The cubic root of 398263 is about 73.5738225076.

The spelling of 398263 in words is "three hundred ninety-eight thousand, two hundred sixty-three".