40581140 has 24 divisors (see below), whose sum is σ = 85368192. Its totient is φ = 16204320.

The previous prime is 40581133. The next prime is 40581161. The reversal of 40581140 is 4118504.

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, 13145 + ... + 15935.

It is an arithmetic number, because the mean of its divisors is an integer number (3557008).

Almost surely, 2^40581140 is an apocalyptic number.

It is an amenable number.

40581140 is an abundant number, since it is smaller than the sum of its proper divisors (44787052).

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

40581140 is a wasteful number, since it uses less digits than its factorization.

40581140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3527 (or 3525 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 40581140 is about 6370.3328013535. The cubic root of 40581140 is about 343.6434583318.

Adding to 40581140 its reverse (4118504), we get a palindrome (44699644).

The spelling of 40581140 in words is "forty million, five hundred eighty-one thousand, one hundred forty".