40820717 has 8 divisors (see below), whose sum is σ = 47737536. Its totient is φ = 34175232.

The previous prime is 40820687. The next prime is 40820737. The reversal of 40820717 is 71702804.

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

It is a de Polignac number, because none of the positive numbers 2^k-40820717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40820717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40820737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67508 + ... + 68109.

It is an arithmetic number, because the mean of its divisors is an integer number (5967192).

Almost surely, 2^40820717 is an apocalyptic number.

It is an amenable number.

40820717 is a deficient number, since it is larger than the sum of its proper divisors (6916819).

40820717 is a wasteful number, since it uses less digits than its factorization.

40820717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135667.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 40820717 is about 6389.1092493398. The cubic root of 40820717 is about 344.3183825618.

The spelling of 40820717 in words is "forty million, eight hundred twenty thousand, seven hundred seventeen".