40323644 has 24 divisors (see below), whose sum is σ = 71845536. Its totient is φ = 19800000.

The previous prime is 40323631. The next prime is 40323649. The reversal of 40323644 is 44632304.

40323644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40323649) 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, 60674 + ... + 61334.

It is an arithmetic number, because the mean of its divisors is an integer number (2993564).

Almost surely, 2^40323644 is an apocalyptic number.

It is an amenable number.

40323644 is a deficient number, since it is larger than the sum of its proper divisors (31521892).

40323644 is a wasteful number, since it uses less digits than its factorization.

40323644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 915 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 40323644 is about 6350.0900781013. The cubic root of 40323644 is about 342.9150852139.

Adding to 40323644 its reverse (44632304), we get a palindrome (84955948).

The spelling of 40323644 in words is "forty million, three hundred twenty-three thousand, six hundred forty-four".