40513988 has 12 divisors (see below), whose sum is σ = 70971180. Its totient is φ = 20236512.

The previous prime is 40513987. The next prime is 40514039. The reversal of 40513988 is 88931504.

It can be written as a sum of positive squares in 2 ways, for example, as 13557124 + 26956864 = 3682^2 + 5192^2 .

It is not an unprimeable number, because it can be changed into a prime (40513987) 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 3 ways as a sum of consecutive naturals, for example, 131 + ... + 9002.

It is an arithmetic number, because the mean of its divisors is an integer number (5914265).

Almost surely, 2^40513988 is an apocalyptic number.

It is an amenable number.

40513988 is a deficient number, since it is larger than the sum of its proper divisors (30457192).

40513988 is a wasteful number, since it uses less digits than its factorization.

40513988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10246 (or 10244 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 40513988 is about 6365.0599368741. The cubic root of 40513988 is about 343.4538046666.

The spelling of 40513988 in words is "forty million, five hundred thirteen thousand, nine hundred eighty-eight".