43612816 has 45 divisors (see below), whose sum is σ = 92225961. Its totient is φ = 19970496.

The previous prime is 43612801. The next prime is 43612817. The reversal of 43612816 is 61821634.

It is a happy number.

The square root of 43612816 is 6604.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6451600 + 37161216 = 2540^2 + 6096^2 .

It is a Duffinian number.

Its product of digits (6912) is a multiple of the sum of its prime factors (288).

It is not an unprimeable number, because it can be changed into a prime (43612817) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 343345 + ... + 343471.

Almost surely, 2^43612816 is an apocalyptic number.

43612816 is the 6604-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43612816

43612816 is an abundant number, since it is smaller than the sum of its proper divisors (48613145).

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

43612816 is a wasteful number, since it uses less digits than its factorization.

43612816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 142 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The cubic root of 43612816 is about 351.9962551254.

The spelling of 43612816 in words is "forty-three million, six hundred twelve thousand, eight hundred sixteen".