40315409 has 4 divisors (see below), whose sum is σ = 40340916. Its totient is φ = 40289904.

The previous prime is 40315403. The next prime is 40315417. The reversal of 40315409 is 90451304.

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 18037009 + 22278400 = 4247^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 40315409 - 2⁴ = 40315393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40315403) by changing a digit.

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, 10214 + ... + 13599.

It is an arithmetic number, because the mean of its divisors is an integer number (10085229).

Almost surely, 2^40315409 is an apocalyptic number.

It is an amenable number.

40315409 is a deficient number, since it is larger than the sum of its proper divisors (25507).

40315409 is a wasteful number, since it uses less digits than its factorization.

40315409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25506.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 40315409 is about 6349.4416289938. The cubic root of 40315409 is about 342.8917399529.

The spelling of 40315409 in words is "forty million, three hundred fifteen thousand, four hundred nine".