436340 has 12 divisors (see below), whose sum is σ = 916356. Its totient is φ = 174528.

The previous prime is 436313. The next prime is 436343. The reversal of 436340 is 43634.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 226576 + 209764 = 476^2 + 458^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 21817 = 436340 / (4 + 3 + 6 + 3 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (436343) by changing a digit.

436340 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 3 ways as a sum of consecutive naturals, for example, 10889 + ... + 10928.

It is an arithmetic number, because the mean of its divisors is an integer number (76363).

2⁴³⁶³⁴⁰ is an apocalyptic number.

It is an amenable number.

436340 is an abundant number, since it is smaller than the sum of its proper divisors (480016).

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

436340 is a wasteful number, since it uses less digits than its factorization.

436340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21826 (or 21824 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 436340 is about 660.5603681724. The cubic root of 436340 is about 75.8475707546.

Adding to 436340 its reverse (43634), we get a palindrome (479974).

It can be divided in two parts, 436 and 340, that multiplied together give a triangular number (148240 = T₅₄₄).

The spelling of 436340 in words is "four hundred thirty-six thousand, three hundred forty".