43140640 has 96 divisors (see below), whose sum is σ = 112129920. Its totient is φ = 15611904.

The previous prime is 43140637. The next prime is 43140667. The reversal of 43140640 is 4604134.

It is a happy number.

It is a super-2 number, since 2×43140640² = 3722229639219200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69612 + ... + 70228.

It is an arithmetic number, because the mean of its divisors is an integer number (1168020).

Almost surely, 2^43140640 is an apocalyptic number.

43140640 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 43140640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56064960).

43140640 is an abundant number, since it is smaller than the sum of its proper divisors (68989280).

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

43140640 is a wasteful number, since it uses less digits than its factorization.

43140640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 43140640 is about 6568.1534695834. The cubic root of 43140640 is about 350.7213422403.

Adding to 43140640 its reverse (4604134), we get a palindrome (47744774).

The spelling of 43140640 in words is "forty-three million, one hundred forty thousand, six hundred forty".