43091270040 has 512 divisors, whose sum is σ = 170547793920. Its totient is φ = 8459624448.

The previous prime is 43091270011. The next prime is 43091270041. The reversal of 43091270040 is 4007219034.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43091270041) 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 127 ways as a sum of consecutive naturals, for example, 9290602 + ... + 9295238.

It is an arithmetic number, because the mean of its divisors is an integer number (333101160).

Almost surely, 2^43091270040 is an apocalyptic number.

43091270040 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 43091270040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85273896960).

43091270040 is an abundant number, since it is smaller than the sum of its proper divisors (127456523880).

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

43091270040 is a wasteful number, since it uses less digits than its factorization.

43091270040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731 (or 4727 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

Adding to 43091270040 its reverse (4007219034), we get a palindrome (47098489074).

The spelling of 43091270040 in words is "forty-three billion, ninety-one million, two hundred seventy thousand, forty".