40581336 has 32 divisors (see below), whose sum is σ = 103815360. Its totient is φ = 13212192.

The previous prime is 40581313. The next prime is 40581337. The reversal of 40581336 is 63318504.

40581336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40581337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18630 + ... + 20693.

It is an arithmetic number, because the mean of its divisors is an integer number (3244230).

Almost surely, 2^40581336 is an apocalyptic number.

It is an amenable number.

40581336 is an abundant number, since it is smaller than the sum of its proper divisors (63234024).

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

40581336 is a wasteful number, since it uses less digits than its factorization.

40581336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39375 (or 39371 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 40581336 is about 6370.3481851466. The cubic root of 40581336 is about 343.6440115774.

The spelling of 40581336 in words is "forty million, five hundred eighty-one thousand, three hundred thirty-six".