263240 has 16 divisors (see below), whose sum is σ = 592380. Its totient is φ = 105280.

The previous prime is 263239. The next prime is 263257. The reversal of 263240 is 42362.

It can be written as a sum of positive squares in 2 ways, for example, as 252004 + 11236 = 502^2 + 106^2 .

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, 3251 + ... + 3330.

2²⁶³²⁴⁰ is an apocalyptic number.

263240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263240 is an abundant number, since it is smaller than the sum of its proper divisors (329140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263240 is a wasteful number, since it uses less digits than its factorization.

263240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6592 (or 6588 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 263240 is about 513.0691961130. The cubic root of 263240 is about 64.0890686941.

The spelling of 263240 in words is "two hundred sixty-three thousand, two hundred forty".