43140032 has 56 divisors (see below), whose sum is σ = 97078800. Its totient is φ = 18855936.

The previous prime is 43140011. The next prime is 43140037. The reversal of 43140032 is 23004134.

It is a super-2 number, since 2×43140032² = 3722124721922048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43140037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14444 + ... + 17172.

It is an arithmetic number, because the mean of its divisors is an integer number (1733550).

Almost surely, 2^43140032 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 43140032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48539400).

43140032 is an abundant number, since it is smaller than the sum of its proper divisors (53938768).

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

43140032 is a wasteful number, since it uses less digits than its factorization.

43140032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773 (or 2763 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 43140032 is about 6568.1071854835. The cubic root of 43140032 is about 350.7196946092.

Adding to 43140032 its reverse (23004134), we get a palindrome (66144166).

The spelling of 43140032 in words is "forty-three million, one hundred forty thousand, thirty-two".