40405564 has 12 divisors (see below), whose sum is σ = 70810600. Its totient is φ = 20173968.

The previous prime is 40405559. The next prime is 40405601. The reversal of 40405564 is 46550404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3879 + ... + 9790.

Almost surely, 2^40405564 is an apocalyptic number.

It is an amenable number.

40405564 is a deficient number, since it is larger than the sum of its proper divisors (30405036).

40405564 is a wasteful number, since it uses less digits than its factorization.

40405564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14412 (or 14410 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 40405564 is about 6356.5371075767. The cubic root of 40405564 is about 343.1471459369.

Adding to 40405564 its reverse (46550404), we get a palindrome (86955968).

It can be divided in two parts, 4040 and 5564, that added together give a square (9604 = 98²).

The spelling of 40405564 in words is "forty million, four hundred five thousand, five hundred sixty-four".