40046809 has 8 divisors (see below), whose sum is σ = 43813440. Its totient is φ = 36301200.

The previous prime is 40046801. The next prime is 40046819. The reversal of 40046809 is 90864004.

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 40046809 - 2³ = 40046801 is a prime.

It is a super-2 number, since 2×40046809² = 3207493822164962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40046801) 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 7 ways as a sum of consecutive naturals, for example, 1122 + ... + 9019.

It is an arithmetic number, because the mean of its divisors is an integer number (5476680).

Almost surely, 2^40046809 is an apocalyptic number.

It is an amenable number.

40046809 is a deficient number, since it is larger than the sum of its proper divisors (3766631).

40046809 is a wasteful number, since it uses less digits than its factorization.

40046809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40046809 is about 6328.2548147179. The cubic root of 40046809 is about 342.1285411051.

The spelling of 40046809 in words is "forty million, forty-six thousand, eight hundred nine".