263838 has 8 divisors (see below), whose sum is σ = 527688. Its totient is φ = 87944.

The previous prime is 263827. The next prime is 263843. The reversal of 263838 is 838362.

It is a sphenic number, since it is the product of 3 distinct primes.

263838 is an admirable number.

It is a super-2 number, since 2×263838² = 139220980488, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁸ + 6⁴ + 8² + 3³ + 3⁵ + 8² .

It is a congruent number.

It is an unprimeable number.

263838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21981 + ... + 21992.

It is an arithmetic number, because the mean of its divisors is an integer number (65961).

2²⁶³⁸³⁸ is an apocalyptic number.

263838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263838 is a wasteful number, since it uses less digits than its factorization.

263838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43978.

The product of its digits is 6912, while the sum is 30.

The square root of 263838 is about 513.6516329187. The cubic root of 263838 is about 64.1375621837.

The spelling of 263838 in words is "two hundred sixty-three thousand, eight hundred thirty-eight".