43809136 has 120 divisors (see below), whose sum is σ = 110684880. Its totient is φ = 16644096.

The previous prime is 43809133. The next prime is 43809149. The reversal of 43809136 is 63190834.

43809136 is nontrivially palindromic in base 6.

43809136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43809133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253146 + ... + 253318.

It is an arithmetic number, because the mean of its divisors is an integer number (922374).

Almost surely, 2^43809136 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 43809136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55342440).

43809136 is an abundant number, since it is smaller than the sum of its proper divisors (66875744).

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

43809136 is a wasteful number, since it uses less digits than its factorization.

43809136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 43809136 is about 6618.8470295060. The cubic root of 43809136 is about 352.5236266711.

The spelling of 43809136 in words is "forty-three million, eight hundred nine thousand, one hundred thirty-six".