40715909 has 8 divisors (see below), whose sum is σ = 44129400. Its totient is φ = 37342656.

The previous prime is 40715903. The next prime is 40715921. The reversal of 40715909 is 90951704.

40715909 = 192² + 193² + ... + 505².

It can be written as a sum of positive squares in 4 ways, for example, as 748225 + 39967684 = 865^2 + 6322^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40715909 - 2⁴ = 40715893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40715903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7934 + ... + 12015.

It is an arithmetic number, because the mean of its divisors is an integer number (5516175).

Almost surely, 2^40715909 is an apocalyptic number.

It is an amenable number.

40715909 is a deficient number, since it is larger than the sum of its proper divisors (3413491).

40715909 is a wasteful number, since it uses less digits than its factorization.

40715909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20119.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 40715909 is about 6380.9018955004. The cubic root of 40715909 is about 344.0234485774.

The spelling of 40715909 in words is "forty million, seven hundred fifteen thousand, nine hundred nine".