40088581 has 4 divisors (see below), whose sum is σ = 43172332. Its totient is φ = 37004832.

The previous prime is 40088557. The next prime is 40088593. The reversal of 40088581 is 18588004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17715681 + 22372900 = 4209^2 + 4730^2 .

It is a cyclic number.

It is not a de Polignac number, because 40088581 - 2¹¹ = 40086533 is a prime.

It is a super-2 number, since 2×40088581² = 3214188653187122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40088281) 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, 1541856 + ... + 1541881.

It is an arithmetic number, because the mean of its divisors is an integer number (10793083).

Almost surely, 2^40088581 is an apocalyptic number.

It is an amenable number.

40088581 is a deficient number, since it is larger than the sum of its proper divisors (3083751).

40088581 is a wasteful number, since it uses less digits than its factorization.

40088581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083750.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 40088581 is about 6331.5543905111. The cubic root of 40088581 is about 342.2474555092.

The spelling of 40088581 in words is "forty million, eighty-eight thousand, five hundred eighty-one".