40288805 has 4 divisors (see below), whose sum is σ = 48346572. Its totient is φ = 32231040.

The previous prime is 40288777. The next prime is 40288813. The reversal of 40288805 is 50888204.

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 7134241 + 33154564 = 2671^2 + 5758^2 .

It is not a de Polignac number, because 40288805 - 2¹⁰ = 40287781 is a prime.

It is a Duffinian number.

It is a congruent 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, 4028876 + ... + 4028885.

It is an arithmetic number, because the mean of its divisors is an integer number (12086643).

Almost surely, 2^40288805 is an apocalyptic number.

It is an amenable number.

40288805 is a deficient number, since it is larger than the sum of its proper divisors (8057767).

40288805 is an equidigital number, since it uses as much as digits as its factorization.

40288805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8057766.

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 40288805 is about 6347.3462958941. The cubic root of 40288805 is about 342.8162989953.

The spelling of 40288805 in words is "forty million, two hundred eighty-eight thousand, eight hundred five".