263138 has 8 divisors (see below), whose sum is σ = 404460. Its totient is φ = 128320.

The previous prime is 263129. The next prime is 263167. The reversal of 263138 is 831362.

It can be written as a sum of positive squares in 2 ways, for example, as 247009 + 16129 = 497^2 + 127^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1523 + ... + 1686.

2²⁶³¹³⁸ is an apocalyptic number.

263138 is a deficient number, since it is larger than the sum of its proper divisors (141322).

263138 is a wasteful number, since it uses less digits than its factorization.

263138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252.

The product of its digits is 864, while the sum is 23.

The square root of 263138 is about 512.9697846852. The cubic root of 263138 is about 64.0807898997.

The spelling of 263138 in words is "two hundred sixty-three thousand, one hundred thirty-eight".