263778 has 8 divisors (see below), whose sum is σ = 527568. Its totient is φ = 87924.

The previous prime is 263761. The next prime is 263803. The reversal of 263778 is 877362.

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

263778 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21976 + ... + 21987.

It is an arithmetic number, because the mean of its divisors is an integer number (65946).

2²⁶³⁷⁷⁸ is an apocalyptic number.

263778 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.

263778 is a wasteful number, since it uses less digits than its factorization.

263778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43968.

The product of its digits is 14112, while the sum is 33.

The square root of 263778 is about 513.5932242544. The cubic root of 263778 is about 64.1326999254.

The spelling of 263778 in words is "two hundred sixty-three thousand, seven hundred seventy-eight".