263398 has 16 divisors (see below), whose sum is σ = 428544. Its totient is φ = 120960.

The previous prime is 263387. The next prime is 263399. The reversal of 263398 is 893362.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2011 + ... + 2137.

It is an arithmetic number, because the mean of its divisors is an integer number (26784).

2²⁶³³⁹⁸ is an apocalyptic number.

263398 is a deficient number, since it is larger than the sum of its proper divisors (165146).

263398 is a wasteful number, since it uses less digits than its factorization.

263398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207.

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

The square root of 263398 is about 513.2231483478. The cubic root of 263398 is about 64.1018884879.

The spelling of 263398 in words is "two hundred sixty-three thousand, three hundred ninety-eight".