40011005 has 4 divisors (see below), whose sum is σ = 48013212. Its totient is φ = 32008800.

The previous prime is 40011001. The next prime is 40011019. The reversal of 40011005 is 50011004.

40011005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 30063289 + 9947716 = 5483^2 + 3154^2 .

It is not a de Polignac number, because 40011005 - 2² = 40011001 is a prime.

It is a super-2 number, since 2×40011005² = 3201761042220050, 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 (40011001) 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 3 ways as a sum of consecutive naturals, for example, 4001096 + ... + 4001105.

It is an arithmetic number, because the mean of its divisors is an integer number (12003303).

Almost surely, 2^40011005 is an apocalyptic number.

It is an amenable number.

40011005 is a deficient number, since it is larger than the sum of its proper divisors (8002207).

40011005 is an equidigital number, since it uses as much as digits as its factorization.

40011005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8002206.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 40011005 is about 6325.4252821451. The cubic root of 40011005 is about 342.0265502683.

Subtracting from 40011005 its product of nonzero digits (20), we obtain a triangular number (40010985 = T₈₉₄₅).

Adding to 40011005 its reverse (50011004), we get a palindrome (90022009).

Subtracting 40011005 from its reverse (50011004), we obtain a palindrome (9999999).

The spelling of 40011005 in words is "forty million, eleven thousand, five".