240436 has 24 divisors (see below), whose sum is σ = 498176. Its totient is φ = 99360.

The previous prime is 240433. The next prime is 240437. The reversal of 240436 is 634042.

240436 = 36² + 37² + ... + 91².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730 + ... + 1006.

2²⁴⁰⁴³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249088).

240436 is an abundant number, since it is smaller than the sum of its proper divisors (257740).

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

240436 is a wasteful number, since it uses less digits than its factorization.

240436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 240436 is about 490.3427372767. The cubic root of 240436 is about 62.1822593919.

Adding to 240436 its reverse (634042), we get a palindrome (874478).

It can be divided in two parts, 240 and 436, that added together give a palindrome (676).

The spelling of 240436 in words is "two hundred forty thousand, four hundred thirty-six".