40806931 has 8 divisors (see below), whose sum is σ = 45602928. Its totient is φ = 36192000.

The previous prime is 40806917. The next prime is 40806947. The reversal of 40806931 is 13960804.

40806931 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 a cyclic number.

It is not a de Polignac number, because 40806931 - 2²⁵ = 7252499 is a prime.

It is a super-2 number, since 2×40806931² = 3330411235277522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40806893 and 40806902.

It is not an unprimeable number, because it can be changed into a prime (40806971) 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, 44790 + ... + 45691.

It is an arithmetic number, because the mean of its divisors is an integer number (5700366).

Almost surely, 2^40806931 is an apocalyptic number.

40806931 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40806931 is a deficient number, since it is larger than the sum of its proper divisors (4795997).

40806931 is a wasteful number, since it uses less digits than its factorization.

40806931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90533.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40806931 is about 6388.0302910991. The cubic root of 40806931 is about 344.2796170523.

It can be divided in two parts, 4080 and 6931, that added together give a palindrome (11011).

The spelling of 40806931 in words is "forty million, eight hundred six thousand, nine hundred thirty-one".