40645317 has 8 divisors (see below), whose sum is σ = 57381696. Its totient is φ = 25502912.

The previous prime is 40645307. The next prime is 40645331. The reversal of 40645317 is 71354604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40645317 - 2¹¹ = 40643269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40645307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398433 + ... + 398534.

It is an arithmetic number, because the mean of its divisors is an integer number (7172712).

Almost surely, 2^40645317 is an apocalyptic number.

It is an amenable number.

40645317 is a deficient number, since it is larger than the sum of its proper divisors (16736379).

40645317 is a wasteful number, since it uses less digits than its factorization.

40645317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796987.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 40645317 is about 6375.3679893791. The cubic root of 40645317 is about 343.8245144469.

The spelling of 40645317 in words is "forty million, six hundred forty-five thousand, three hundred seventeen".