43534240 has 48 divisors (see below), whose sum is σ = 103367880. Its totient is φ = 17326080.

The previous prime is 43534219. The next prime is 43534243. The reversal of 43534240 is 4243534.

It can be written as a sum of positive squares in 4 ways, for example, as 30603024 + 12931216 = 5532^2 + 3596^2 .

It is not an unprimeable number, because it can be changed into a prime (43534243) 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, 37996 + ... + 39124.

Almost surely, 2^43534240 is an apocalyptic number.

43534240 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 43534240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51683940).

43534240 is an abundant number, since it is smaller than the sum of its proper divisors (59833640).

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

43534240 is a wasteful number, since it uses less digits than its factorization.

43534240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 43534240 is about 6598.0481962471. The cubic root of 43534240 is about 351.7847340833.

Adding to 43534240 its reverse (4243534), we get a palindrome (47777774).

The spelling of 43534240 in words is "forty-three million, five hundred thirty-four thousand, two hundred forty".