40105845 has 48 divisors (see below), whose sum is σ = 75479040. Its totient is φ = 19582848.

The previous prime is 40105829. The next prime is 40105861. The reversal of 40105845 is 54850104.

It is an interprime number because it is at equal distance from previous prime (40105829) and next prime (40105861).

It is not a de Polignac number, because 40105845 - 2⁴ = 40105829 is a prime.

Together with 35373195 it forms an amicable pair .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104524 + ... + 104906.

It is an arithmetic number, because the mean of its divisors is an integer number (1572480).

Almost surely, 2^40105845 is an apocalyptic number.

40105845 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40105845 is a deficient number, since it is larger than the sum of its proper divisors (35373195).

40105845 is a wasteful number, since it uses less digits than its factorization.

40105845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 40105845 is about 6332.9175740728. The cubic root of 40105845 is about 342.2965776612.

Adding to 40105845 its reverse (54850104), we get a palindrome (94955949).

The spelling of 40105845 in words is "forty million, one hundred five thousand, eight hundred forty-five".