43432240 has 80 divisors (see below), whose sum is σ = 105993216. Its totient is φ = 16531200.

The previous prime is 43432231. The next prime is 43432241. The reversal of 43432240 is 4223434.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (43432241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205735 + ... + 205945.

Almost surely, 2^43432240 is an apocalyptic number.

43432240 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 43432240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52996608).

43432240 is an abundant number, since it is smaller than the sum of its proper divisors (62560976).

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

43432240 is a wasteful number, since it uses less digits than its factorization.

43432240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 43432240 is about 6590.3141048056. The cubic root of 43432240 is about 351.5097773053.

Adding to 43432240 its reverse (4223434), we get a palindrome (47655674).

The spelling of 43432240 in words is "forty-three million, four hundred thirty-two thousand, two hundred forty".