43641738 has 48 divisors (see below), whose sum is σ = 111561216. Its totient is φ = 12065760.

The previous prime is 43641721. The next prime is 43641751. The reversal of 43641738 is 83714634.

43641738 is a `hidden beast` number, since 4 + 3 + 641 + 7 + 3 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1681 + ... + 9492.

It is an arithmetic number, because the mean of its divisors is an integer number (2324192).

Almost surely, 2^43641738 is an apocalyptic number.

43641738 is an abundant number, since it is smaller than the sum of its proper divisors (67919478).

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

43641738 is a wasteful number, since it uses less digits than its factorization.

43641738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11219 (or 11216 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 43641738 is about 6606.1893705827. The cubic root of 43641738 is about 352.0740471375.

The spelling of 43641738 in words is "forty-three million, six hundred forty-one thousand, seven hundred thirty-eight".