40160909 has 4 divisors (see below), whose sum is σ = 40918716. Its totient is φ = 39403104.

The previous prime is 40160899. The next prime is 40160929. The reversal of 40160909 is 90906104.

40160909 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 22705225 + 17455684 = 4765^2 + 4178^2 .

It is a cyclic number.

It is not a de Polignac number, because 40160909 - 2¹² = 40156813 is a prime.

It is a super-2 number, since 2×40160909² = 3225797223412562, 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 (40160929) 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, 378824 + ... + 378929.

It is an arithmetic number, because the mean of its divisors is an integer number (10229679).

Almost surely, 2^40160909 is an apocalyptic number.

It is an amenable number.

40160909 is a deficient number, since it is larger than the sum of its proper divisors (757807).

40160909 is an equidigital number, since it uses as much as digits as its factorization.

40160909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757806.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 40160909 is about 6337.2635261602. The cubic root of 40160909 is about 342.4531599859.

The spelling of 40160909 in words is "forty million, one hundred sixty thousand, nine hundred nine".