43138816 has 108 divisors (see below), whose sum is σ = 106022280. Its totient is φ = 17418240.

The previous prime is 43138787. The next prime is 43138831. The reversal of 43138816 is 61883134.

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, 238246 + ... + 238426.

Almost surely, 2^43138816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43138816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53011140).

43138816 is an abundant number, since it is smaller than the sum of its proper divisors (62883464).

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

43138816 is a wasteful number, since it uses less digits than its factorization.

43138816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 209 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 43138816 is about 6568.0146163053. The cubic root of 43138816 is about 350.7163993006.

The spelling of 43138816 in words is "forty-three million, one hundred thirty-eight thousand, eight hundred sixteen".