40505717 has 8 divisors (see below), whose sum is σ = 46373376. Its totient is φ = 34658352.

The previous prime is 40505671. The next prime is 40505719. The reversal of 40505717 is 71750504.

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 40505717 - 2²⁴ = 23728501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40505717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505719) 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, 518 + ... + 9015.

It is an arithmetic number, because the mean of its divisors is an integer number (5796672).

Almost surely, 2^40505717 is an apocalyptic number.

It is an amenable number.

40505717 is a deficient number, since it is larger than the sum of its proper divisors (5867659).

40505717 is an equidigital number, since it uses as much as digits as its factorization.

40505717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10147.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 40505717 is about 6364.4101847697. The cubic root of 40505717 is about 343.4304308485.

The spelling of 40505717 in words is "forty million, five hundred five thousand, seven hundred seventeen".