43232640 has 256 divisors, whose sum is σ = 158630400. Its totient is φ = 9912320.

The previous prime is 43232639. The next prime is 43232641. The reversal of 43232640 is 4623234.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43232639) and next prime (43232641).

It is a super-2 number, since 2×43232640² = 3738122322739200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 43232640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43232641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485716 + ... + 485804.

It is an arithmetic number, because the mean of its divisors is an integer number (619650).

Almost surely, 2^43232640 is an apocalyptic number.

43232640 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 43232640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79315200).

43232640 is an abundant number, since it is smaller than the sum of its proper divisors (115397760).

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

43232640 is a wasteful number, since it uses less digits than its factorization.

43232640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 43232640 is about 6575.1532301537. The cubic root of 43232640 is about 350.9704766525.

Adding to 43232640 its reverse (4623234), we get a palindrome (47855874).

The spelling of 43232640 in words is "forty-three million, two hundred thirty-two thousand, six hundred forty".