40163905 has 4 divisors (see below), whose sum is σ = 48196692. Its totient is φ = 32131120.

The previous prime is 40163899. The next prime is 40163933. The reversal of 40163905 is 50936104.

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 31730689 + 8433216 = 5633^2 + 2904^2 .

It is not a de Polignac number, because 40163905 - 2⁹ = 40163393 is a prime.

It is a super-2 number, since 2×40163905² = 3226278529698050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4016386 + ... + 4016395.

It is an arithmetic number, because the mean of its divisors is an integer number (12049173).

Almost surely, 2^40163905 is an apocalyptic number.

It is an amenable number.

40163905 is a deficient number, since it is larger than the sum of its proper divisors (8032787).

40163905 is an equidigital number, since it uses as much as digits as its factorization.

40163905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8032786.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 40163905 is about 6337.4999013807. The cubic root of 40163905 is about 342.4616754319.

It can be divided in two parts, 4016 and 3905, that added together give a square (7921 = 89²).

The spelling of 40163905 in words is "forty million, one hundred sixty-three thousand, nine hundred five".