40508881 has 8 divisors (see below), whose sum is σ = 47372864. Its totient is φ = 33914160.

The previous prime is 40508863. The next prime is 40508887. The reversal of 40508881 is 18880504.

40508881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40508881 - 2⁷ = 40508753 is a prime.

It is a super-2 number, since 2×40508881² = 3281938879744322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40508887) 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, 66990 + ... + 67591.

It is an arithmetic number, because the mean of its divisors is an integer number (5921608).

Almost surely, 2^40508881 is an apocalyptic number.

It is an amenable number.

40508881 is a deficient number, since it is larger than the sum of its proper divisors (6863983).

40508881 is a wasteful number, since it uses less digits than its factorization.

40508881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134631.

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

The square root of 40508881 is about 6364.6587496896. The cubic root of 40508881 is about 343.4393726776.

The spelling of 40508881 in words is "forty million, five hundred eight thousand, eight hundred eighty-one".