40317644 has 12 divisors (see below), whose sum is σ = 70742784. Its totient is φ = 20105424.

The previous prime is 40317631. The next prime is 40317647. The reversal of 40317644 is 44671304.

40317644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (40317647) 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 3 ways as a sum of consecutive naturals, for example, 11627 + ... + 14690.

It is an arithmetic number, because the mean of its divisors is an integer number (5895232).

Almost surely, 2^40317644 is an apocalyptic number.

It is an amenable number.

40317644 is a deficient number, since it is larger than the sum of its proper divisors (30425140).

40317644 is a wasteful number, since it uses less digits than its factorization.

40317644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26704 (or 26702 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 40317644 is about 6349.6176262827. The cubic root of 40317644 is about 342.8980762305.

Adding to 40317644 its reverse (44671304), we get a palindrome (84988948).

The spelling of 40317644 in words is "forty million, three hundred seventeen thousand, six hundred forty-four".