40317638 has 4 divisors (see below), whose sum is σ = 60476460. Its totient is φ = 20158818.

The previous prime is 40317631. The next prime is 40317647. The reversal of 40317638 is 83671304.

40317638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40317631) 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 as a sum of consecutive naturals, namely, 10079408 + ... + 10079411.

It is an arithmetic number, because the mean of its divisors is an integer number (15119115).

Almost surely, 2^40317638 is an apocalyptic number.

40317638 is a deficient number, since it is larger than the sum of its proper divisors (20158822).

40317638 is a wasteful number, since it uses less digits than its factorization.

40317638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20158821.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40317638 is about 6349.6171538133. The cubic root of 40317638 is about 342.8980592207.

The spelling of 40317638 in words is "forty million, three hundred seventeen thousand, six hundred thirty-eight".