40738309 has 16 divisors (see below), whose sum is σ = 43352064. Its totient is φ = 38228400.

The previous prime is 40738303. The next prime is 40738339. The reversal of 40738309 is 90383704.

40738309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40738309 - 2⁵ = 40738277 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 (40738303) 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 15 ways as a sum of consecutive naturals, for example, 182572 + ... + 182794.

It is an arithmetic number, because the mean of its divisors is an integer number (2709504).

Almost surely, 2^40738309 is an apocalyptic number.

It is an amenable number.

40738309 is a deficient number, since it is larger than the sum of its proper divisors (2613755).

40738309 is a wasteful number, since it uses less digits than its factorization.

40738309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 40738309 is about 6382.6568919220. The cubic root of 40738309 is about 344.0865255800.

The spelling of 40738309 in words is "forty million, seven hundred thirty-eight thousand, three hundred nine".