260436 has 24 divisors (see below), whose sum is σ = 663264. Its totient is φ = 78880.

The previous prime is 260419. The next prime is 260441. The reversal of 260436 is 634062.

It is a nialpdrome in base 4.

It is a congruent number.

It is an unprimeable number.

260436 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (27636).

2²⁶⁰⁴³⁶ is an apocalyptic number.

It is an amenable number.

260436 is an abundant number, since it is smaller than the sum of its proper divisors (402828).

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

260436 is a wasteful number, since it uses less digits than its factorization.

260436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 260436 is about 510.3293054489. The cubic root of 260436 is about 63.8606996274.

Adding to 260436 its reverse (634062), we get a palindrome (894498).

It can be divided in two parts, 260 and 436, that added together give a palindrome (696).

The spelling of 260436 in words is "two hundred sixty thousand, four hundred thirty-six".