263390 has 8 divisors (see below), whose sum is σ = 474120. Its totient is φ = 105352.

The previous prime is 263387. The next prime is 263399. The reversal of 263390 is 93362.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13160 + ... + 13179.

It is an arithmetic number, because the mean of its divisors is an integer number (59265).

2²⁶³³⁹⁰ is an apocalyptic number.

263390 is a deficient number, since it is larger than the sum of its proper divisors (210730).

263390 is a wasteful number, since it uses less digits than its factorization.

263390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26346.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 263390 is about 513.2153544079. The cubic root of 263390 is about 64.1012395077.

The spelling of 263390 in words is "two hundred sixty-three thousand, three hundred ninety".