40159636 has 24 divisors (see below), whose sum is σ = 77724864. Its totient is φ = 18002880.

The previous prime is 40159631. The next prime is 40159643. The reversal of 40159636 is 63695104.

It is a super-2 number, since 2×40159636² = 3225592727304992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40159631) by changing a digit.

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, 3040 + ... + 9463.

It is an arithmetic number, because the mean of its divisors is an integer number (3238536).

Almost surely, 2^40159636 is an apocalyptic number.

It is an amenable number.

40159636 is a deficient number, since it is larger than the sum of its proper divisors (37565228).

40159636 is a wasteful number, since it uses less digits than its factorization.

40159636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12591 (or 12589 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 40159636 is about 6337.1630876915. The cubic root of 40159636 is about 342.4495416458.

The spelling of 40159636 in words is "forty million, one hundred fifty-nine thousand, six hundred thirty-six".