40429809 has 48 divisors (see below), whose sum is σ = 69264000. Its totient is φ = 22249728.

The previous prime is 40429801. The next prime is 40429817. The reversal of 40429809 is 90892404.

It is a happy number.

40429809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40429801) and next prime (40429817).

It is not a de Polignac number, because 40429809 - 2³ = 40429801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40429801) 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 47 ways as a sum of consecutive naturals, for example, 271267 + ... + 271415.

It is an arithmetic number, because the mean of its divisors is an integer number (1443000).

Almost surely, 2^40429809 is an apocalyptic number.

It is an amenable number.

40429809 is a deficient number, since it is larger than the sum of its proper divisors (28834191).

40429809 is a wasteful number, since it uses less digits than its factorization.

40429809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 40429809 is about 6358.4439134115. The cubic root of 40429809 is about 343.2157663466.

The spelling of 40429809 in words is "forty million, four hundred twenty-nine thousand, eight hundred nine".