43730640 has 60 divisors (see below), whose sum is σ = 146864484. Its totient is φ = 11661312.

The previous prime is 43730639. The next prime is 43730663. The reversal of 43730640 is 4603734.

It can be written as a sum of positive squares in 2 ways, for example, as 23155344 + 20575296 = 4812^2 + 4536^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29649 + ... + 31088.

Almost surely, 2^43730640 is an apocalyptic number.

43730640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43730640 is an abundant number, since it is smaller than the sum of its proper divisors (103133844).

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

43730640 is a wasteful number, since it uses less digits than its factorization.

43730640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60756 (or 60747 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 43730640 is about 6612.9146372836. The cubic root of 43730640 is about 352.3129534286.

The spelling of 43730640 in words is "forty-three million, seven hundred thirty thousand, six hundred forty".