40007305 has 8 divisors (see below), whose sum is σ = 51701832. Its totient is φ = 29543808.

The previous prime is 40007263. The next prime is 40007309. The reversal of 40007305 is 50370004.

It can be written as a sum of positive squares in 4 ways, for example, as 8602489 + 31404816 = 2933^2 + 5604^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40007305 - 2⁹ = 40006793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40007309) 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, 307684 + ... + 307813.

It is an arithmetic number, because the mean of its divisors is an integer number (6462729).

Almost surely, 2^40007305 is an apocalyptic number.

It is an amenable number.

40007305 is a deficient number, since it is larger than the sum of its proper divisors (11694527).

40007305 is a wasteful number, since it uses less digits than its factorization.

40007305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615515.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 40007305 is about 6325.1328049299. The cubic root of 40007305 is about 342.0160070253.

Adding to 40007305 its reverse (50370004), we get a palindrome (90377309).

The spelling of 40007305 in words is "forty million, seven thousand, three hundred five".