263478 has 8 divisors (see below), whose sum is σ = 526968. Its totient is φ = 87824.

The previous prime is 263443. The next prime is 263489. The reversal of 263478 is 874362.

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

263478 is an admirable number.

It is a d-powerful number, because it can be written as 2⁹ + 6² + 4⁹ + 3⁶ + 7² + 8 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

263478 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 21951 + ... + 21962.

It is an arithmetic number, because the mean of its divisors is an integer number (65871).

2²⁶³⁴⁷⁸ is an apocalyptic number.

263478 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.

263478 is a wasteful number, since it uses less digits than its factorization.

263478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43918.

The product of its digits is 8064, while the sum is 30.

The square root of 263478 is about 513.3010812379. The cubic root of 263478 is about 64.1083775678.

It can be divided in two parts, 263 and 478, that added together give a triangular number (741 = T₃₈).

The spelling of 263478 in words is "two hundred sixty-three thousand, four hundred seventy-eight".