40565449 has 4 divisors (see below), whose sum is σ = 40643536. Its totient is φ = 40487364.

The previous prime is 40565429. The next prime is 40565471. The reversal of 40565449 is 94456504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40565449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40565429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38259 + ... + 39304.

It is an arithmetic number, because the mean of its divisors is an integer number (10160884).

Almost surely, 2^40565449 is an apocalyptic number.

It is an amenable number.

40565449 is a deficient number, since it is larger than the sum of its proper divisors (78087).

40565449 is an equidigital number, since it uses as much as digits as its factorization.

40565449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78086.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 40565449 is about 6369.1011139720. The cubic root of 40565449 is about 343.5991618547.

It can be divided in two parts, 40565 and 449, that added together give a palindrome (41014).

The spelling of 40565449 in words is "forty million, five hundred sixty-five thousand, four hundred forty-nine".