43487440 has 20 divisors (see below), whose sum is σ = 101108484. Its totient is φ = 17394944.

The previous prime is 43487417. The next prime is 43487459. The reversal of 43487440 is 4478434.

It can be written as a sum of positive squares in 2 ways, for example, as 18045504 + 25441936 = 4248^2 + 5044^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 43487396 and 43487405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271717 + ... + 271876.

Almost surely, 2^43487440 is an apocalyptic number.

43487440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43487440 is an abundant number, since it is smaller than the sum of its proper divisors (57621044).

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

43487440 is a wasteful number, since it uses less digits than its factorization.

43487440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543606 (or 543600 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 43487440 is about 6594.5007392524. The cubic root of 43487440 is about 351.6586308245.

The spelling of 43487440 in words is "forty-three million, four hundred eighty-seven thousand, four hundred forty".