40505766 has 16 divisors (see below), whose sum is σ = 92584704. Its totient is φ = 11573064.

The previous prime is 40505741. The next prime is 40505789. The reversal of 40505766 is 66750504.

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 7 ways as a sum of consecutive naturals, for example, 482170 + ... + 482253.

It is an arithmetic number, because the mean of its divisors is an integer number (5786544).

Almost surely, 2^40505766 is an apocalyptic number.

40505766 is an abundant number, since it is smaller than the sum of its proper divisors (52078938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40505766 is a wasteful number, since it uses less digits than its factorization.

40505766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964435.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 40505766 is about 6364.4140343004. The cubic root of 40505766 is about 343.4305693317.

It can be divided in two parts, 405057 and 66, that multiplied together give a palindrome (26733762).

The spelling of 40505766 in words is "forty million, five hundred five thousand, seven hundred sixty-six".