263480 has 32 divisors (see below), whose sum is σ = 678240. Its totient is φ = 90240.

The previous prime is 263443. The next prime is 263489. The reversal of 263480 is 84362.

263480 = 191² + 192² + ... + 197².

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263489) by changing a digit.

263480 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191 + ... + 750.

It is an arithmetic number, because the mean of its divisors is an integer number (21195).

263480 is a Friedman number, since it can be written as 40*(26+3^8), using all its digits and the basic arithmetic operations.

2²⁶³⁴⁸⁰ is an apocalyptic number.

263480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263480 is an abundant number, since it is smaller than the sum of its proper divisors (414760).

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

263480 is a wasteful number, since it uses less digits than its factorization.

263480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 263480 is about 513.3030294086. The cubic root of 263480 is about 64.1085397780.

The spelling of 263480 in words is "two hundred sixty-three thousand, four hundred eighty".