40814309 has 4 divisors (see below), whose sum is σ = 40852416. Its totient is φ = 40776204.

The previous prime is 40814273. The next prime is 40814317. The reversal of 40814309 is 90341804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40814309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40814329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17399 + ... + 19604.

It is an arithmetic number, because the mean of its divisors is an integer number (10213104).

Almost surely, 2^40814309 is an apocalyptic number.

It is an amenable number.

40814309 is a deficient number, since it is larger than the sum of its proper divisors (38107).

40814309 is a wasteful number, since it uses less digits than its factorization.

40814309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38106.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40814309 is about 6388.6077513023. The cubic root of 40814309 is about 344.3003646874.

The spelling of 40814309 in words is "forty million, eight hundred fourteen thousand, three hundred nine".