40238566 has 16 divisors (see below), whose sum is σ = 61415424. Its totient is φ = 19769544.

The previous prime is 40238557. The next prime is 40238567. The reversal of 40238566 is 66583204.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40238567) 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 7 ways as a sum of consecutive naturals, for example, 36475 + ... + 37561.

It is an arithmetic number, because the mean of its divisors is an integer number (3838464).

Almost surely, 2^40238566 is an apocalyptic number.

40238566 is a deficient number, since it is larger than the sum of its proper divisors (21176858).

40238566 is a wasteful number, since it uses less digits than its factorization.

40238566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 40238566 is about 6343.3875807805. The cubic root of 40238566 is about 342.6737456502.

It can be divided in two parts, 40238 and 566, that added together give a palindrome (40804).

The spelling of 40238566 in words is "forty million, two hundred thirty-eight thousand, five hundred sixty-six".