43040234040 has 128 divisors (see below), whose sum is σ = 130377392640. Its totient is φ = 11366222336.

The previous prime is 43040233993. The next prime is 43040234047. The reversal of 43040234040 is 4043204034.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 43040234040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43040234047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5455939 + ... + 5463821.

It is an arithmetic number, because the mean of its divisors is an integer number (1018573380).

Almost surely, 2^43040234040 is an apocalyptic number.

43040234040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43040234040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65188696320).

43040234040 is an abundant number, since it is smaller than the sum of its proper divisors (87337158600).

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

43040234040 is a wasteful number, since it uses less digits than its factorization.

43040234040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8333 (or 8329 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 43040234040 its reverse (4043204034), we get a palindrome (47083438074).

The spelling of 43040234040 in words is "forty-three billion, forty million, two hundred thirty-four thousand, forty".