43042040412 has 144 divisors (see below), whose sum is σ = 125838599040. Its totient is φ = 11379408768.

The previous prime is 43042040407. The next prime is 43042040453. The reversal of 43042040412 is 21404024034.

It is a happy number.

It is a super-2 number, since 2×43042040412² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 435598 + ... + 525194.

It is an arithmetic number, because the mean of its divisors is an integer number (873879160).

Almost surely, 2^43042040412 is an apocalyptic number.

43042040412 is a gapful number since it is divisible by the number (42) 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 43042040412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62919299520).

43042040412 is an abundant number, since it is smaller than the sum of its proper divisors (82796558628).

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

43042040412 is a wasteful number, since it uses less digits than its factorization.

43042040412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89680 (or 89671 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 43042040412 its reverse (21404024034), we get a palindrome (64446064446).

The spelling of 43042040412 in words is "forty-three billion, forty-two million, forty thousand, four hundred twelve".