43563940 has 36 divisors (see below), whose sum is σ = 106422876. Its totient is φ = 14935872.

The previous prime is 43563937. The next prime is 43563977. The reversal of 43563940 is 4936534.

It is a happy number.

43563940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11573604 + 31990336 = 3402^2 + 5656^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 43563896 and 43563905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21247 + ... + 23206.

It is an arithmetic number, because the mean of its divisors is an integer number (2956191).

Almost surely, 2^43563940 is an apocalyptic number.

It is an amenable number.

43563940 is an abundant number, since it is smaller than the sum of its proper divisors (62858936).

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

43563940 is a wasteful number, since it uses less digits than its factorization.

43563940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44476 (or 44467 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 43563940 is about 6600.2984780993. The cubic root of 43563940 is about 351.8647142824.

The spelling of 43563940 in words is "forty-three million, five hundred sixty-three thousand, nine hundred forty".