43434320 has 80 divisors (see below), whose sum is σ = 108274320. Its totient is φ = 16146432.

The previous prime is 43434319. The next prime is 43434329. The reversal of 43434320 is 2343434.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8340544 + 35093776 = 2888^2 + 5924^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43434329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148094 + ... + 148386.

It is an arithmetic number, because the mean of its divisors is an integer number (1353429).

Almost surely, 2^43434320 is an apocalyptic number.

43434320 is a gapful number since it is divisible by the number (40) 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 43434320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54137160).

43434320 is an abundant number, since it is smaller than the sum of its proper divisors (64840000).

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

43434320 is a wasteful number, since it uses less digits than its factorization.

43434320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 43434320 is about 6590.4719102656. The cubic root of 43434320 is about 351.5153885644.

Adding to 43434320 its reverse (2343434), we get a palindrome (45777754).

The spelling of 43434320 in words is "forty-three million, four hundred thirty-four thousand, three hundred twenty".