40908581 has 8 divisors (see below), whose sum is σ = 47707200. Its totient is φ = 35064204.

The previous prime is 40908563. The next prime is 40908587. The reversal of 40908581 is 18580904.

It is not a de Polignac number, because 40908581 - 2¹⁰ = 40907557 is a prime.

It is a super-2 number, since 2×40908581² = 3347023998867122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40908587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59291 + ... + 59976.

It is an arithmetic number, because the mean of its divisors is an integer number (5963400).

Almost surely, 2^40908581 is an apocalyptic number.

It is an amenable number.

40908581 is a deficient number, since it is larger than the sum of its proper divisors (6798619).

40908581 is an equidigital number, since it uses as much as digits as its factorization.

40908581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119288 (or 119274 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 40908581 is about 6395.9816291168. The cubic root of 40908581 is about 344.5652466747.

The spelling of 40908581 in words is "forty million, nine hundred eight thousand, five hundred eighty-one".