43542240 has 96 divisors (see below), whose sum is σ = 156764160. Its totient is φ = 9951744.

The previous prime is 43542221. The next prime is 43542251. The reversal of 43542240 is 4224534.

It is a tau number, because it is divible by the number of its divisors (96).

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 43542240.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3120 + ... + 9839.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^43542240 is an apocalyptic number.

43542240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43542240 is an abundant number, since it is smaller than the sum of its proper divisors (113221920).

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

43542240 is a wasteful number, since it uses less digits than its factorization.

43542240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12984 (or 12976 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 43542240 is about 6598.6544082866. The cubic root of 43542240 is about 351.8062811498.

Adding to 43542240 its reverse (4224534), we get a palindrome (47766774).

The spelling of 43542240 in words is "forty-three million, five hundred forty-two thousand, two hundred forty".