40368569 has 4 divisors (see below), whose sum is σ = 40436340. Its totient is φ = 40300800.

The previous prime is 40368553. The next prime is 40368571. The reversal of 40368569 is 96586304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21114025 + 19254544 = 4595^2 + 4388^2 .

It is a cyclic number.

It is not a de Polignac number, because 40368569 - 2⁴ = 40368553 is a prime.

It is a super-2 number, since 2×40368569² = 3259242726215522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40368599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32984 + ... + 34185.

It is an arithmetic number, because the mean of its divisors is an integer number (10109085).

Almost surely, 2^40368569 is an apocalyptic number.

It is an amenable number.

40368569 is a deficient number, since it is larger than the sum of its proper divisors (67771).

40368569 is an equidigital number, since it uses as much as digits as its factorization.

40368569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67770.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 40368569 is about 6353.6264447951. The cubic root of 40368569 is about 343.0423863957.

The spelling of 40368569 in words is "forty million, three hundred sixty-eight thousand, five hundred sixty-nine".