269640 has 96 divisors (see below), whose sum is σ = 1010880. Its totient is φ = 61056.

The previous prime is 269623. The next prime is 269641. The reversal of 269640 is 46962.

269640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (269641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2467 + ... + 2573.

It is an arithmetic number, because the mean of its divisors is an integer number (10530).

2²⁶⁹⁶⁴⁰ is an apocalyptic number.

269640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 269640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505440).

269640 is an abundant number, since it is smaller than the sum of its proper divisors (741240).

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

269640 is a wasteful number, since it uses less digits than its factorization.

269640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 269640 is about 519.2687165621. The cubic root of 269640 is about 64.6043021286.

It can be divided in two parts, 269 and 640, that added together give a palindrome (909).

The spelling of 269640 in words is "two hundred sixty-nine thousand, six hundred forty".