43132640 has 24 divisors (see below), whose sum is σ = 101901240. Its totient is φ = 17252992.

The previous prime is 43132633. The next prime is 43132643. The reversal of 43132640 is 4623134.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43132643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134630 + ... + 134949.

It is an arithmetic number, because the mean of its divisors is an integer number (4245885).

Almost surely, 2^43132640 is an apocalyptic number.

43132640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43132640 is an abundant number, since it is smaller than the sum of its proper divisors (58768600).

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

43132640 is a wasteful number, since it uses less digits than its factorization.

43132640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269594 (or 269586 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 43132640 is about 6567.5444421793. The cubic root of 43132640 is about 350.6996616456.

Adding to 43132640 its reverse (4623134), we get a palindrome (47755774).

The spelling of 43132640 in words is "forty-three million, one hundred thirty-two thousand, six hundred forty".