43643216 has 20 divisors (see below), whose sum is σ = 89533332. Its totient is φ = 20537856.

The previous prime is 43643189. The next prime is 43643219. The reversal of 43643216 is 61234634.

It can be written as a sum of positive squares in 2 ways, for example, as 14440000 + 29203216 = 3800^2 + 5404^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43643219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79955 + ... + 80498.

Almost surely, 2^43643216 is an apocalyptic number.

It is an amenable number.

43643216 is an abundant number, since it is smaller than the sum of its proper divisors (45890116).

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

43643216 is a wasteful number, since it uses less digits than its factorization.

43643216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160478 (or 160472 counting only the distinct ones).

The product of its digits is 10368, while the sum is 29.

The square root of 43643216 is about 6606.3012344276. The cubic root of 43643216 is about 352.0780216169.

The spelling of 43643216 in words is "forty-three million, six hundred forty-three thousand, two hundred sixteen".