43132440 has 128 divisors (see below), whose sum is σ = 142813440. Its totient is φ = 10354176.

The previous prime is 43132433. The next prime is 43132457. The reversal of 43132440 is 4423134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66759 + ... + 67401.

It is an arithmetic number, because the mean of its divisors is an integer number (1115730).

Almost surely, 2^43132440 is an apocalyptic number.

43132440 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 43132440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71406720).

43132440 is an abundant number, since it is smaller than the sum of its proper divisors (99681000).

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

43132440 is a wasteful number, since it uses less digits than its factorization.

43132440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 43132440 is about 6567.5292157706. The cubic root of 43132440 is about 350.6991195964.

Adding to 43132440 its reverse (4423134), we get a palindrome (47555574).

The spelling of 43132440 in words is "forty-three million, one hundred thirty-two thousand, four hundred forty".