263944 has 8 divisors (see below), whose sum is σ = 494910. Its totient is φ = 131968.

The previous prime is 263941. The next prime is 263951. The reversal of 263944 is 449362.

It can be written as a sum of positive squares in only one way, i.e., 260100 + 3844 = 510^2 + 62^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2⁵ + 6 + 9 + 3⁶ + 4⁵ + 4⁹ .

It is not an unprimeable number, because it can be changed into a prime (263941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16489 + ... + 16504.

2²⁶³⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

263944 is a deficient number, since it is larger than the sum of its proper divisors (230966).

263944 is a wasteful number, since it uses less digits than its factorization.

263944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32999 (or 32995 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 263944 is about 513.7548053303. The cubic root of 263944 is about 64.1461503720.

The spelling of 263944 in words is "two hundred sixty-three thousand, nine hundred forty-four".