40543644 has 24 divisors (see below), whose sum is σ = 99581440. Its totient is φ = 12803184.

The previous prime is 40543639. The next prime is 40543649. The reversal of 40543644 is 44634504.

40543644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40543639) and next prime (40543649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40543649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 88684 + ... + 89139.

Almost surely, 2^40543644 is an apocalyptic number.

It is an amenable number.

40543644 is an abundant number, since it is smaller than the sum of its proper divisors (59037796).

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

40543644 is a wasteful number, since it uses less digits than its factorization.

40543644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177849 (or 177847 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 40543644 is about 6367.3891038635. The cubic root of 40543644 is about 343.5375862797.

The spelling of 40543644 in words is "forty million, five hundred forty-three thousand, six hundred forty-four".