43640416 has 24 divisors (see below), whose sum is σ = 90440280. Its totient is φ = 20671488.

The previous prime is 43640381. The next prime is 43640417. The reversal of 43640416 is 61404634.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43640417) 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, 35281 + ... + 36496.

It is an arithmetic number, because the mean of its divisors is an integer number (3768345).

Almost surely, 2^43640416 is an apocalyptic number.

It is an amenable number.

43640416 is an abundant number, since it is smaller than the sum of its proper divisors (46799864).

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

43640416 is a wasteful number, since it uses less digits than its factorization.

43640416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71806 (or 71798 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 43640416 is about 6606.0893121422. The cubic root of 43640416 is about 352.0704920805.

The spelling of 43640416 in words is "forty-three million, six hundred forty thousand, four hundred sixteen".