40000565 has 32 divisors (see below), whose sum is σ = 55351296. Its totient is φ = 27466560.

The previous prime is 40000561. The next prime is 40000573. The reversal of 40000565 is 56500004.

It is not a de Polignac number, because 40000565 - 2² = 40000561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130142 + ... + 130448.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 2^40000565 is an apocalyptic number.

It is an amenable number.

40000565 is a deficient number, since it is larger than the sum of its proper divisors (15350731).

40000565 is a wasteful number, since it uses less digits than its factorization.

40000565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 40000565 is about 6324.5999873510. The cubic root of 40000565 is about 341.9967995551.

Adding to 40000565 its reverse (56500004), we get a palindrome (96500569).

The spelling of 40000565 in words is "forty million, five hundred sixty-five", and thus it is an aban number.