40405569 has 8 divisors (see below), whose sum is σ = 54017760. Its totient is φ = 26865216.

The previous prime is 40405559. The next prime is 40405601. The reversal of 40405569 is 96550404.

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

It is not a de Polignac number, because 40405569 - 2¹⁶ = 40340033 is a prime.

It is a super-2 number, since 2×40405569² = 3265220012427522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40405529) 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, 16632 + ... + 18905.

It is an arithmetic number, because the mean of its divisors is an integer number (6752220).

Almost surely, 2^40405569 is an apocalyptic number.

It is an amenable number.

40405569 is a deficient number, since it is larger than the sum of its proper divisors (13612191).

40405569 is a wasteful number, since it uses less digits than its factorization.

40405569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35919.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 40405569 is about 6356.5375008726. The cubic root of 40405569 is about 343.1471600912.

The spelling of 40405569 in words is "forty million, four hundred five thousand, five hundred sixty-nine".