40406709 has 8 divisors (see below), whose sum is σ = 61572160. Its totient is φ = 23089536.

The previous prime is 40406687. The next prime is 40406747. The reversal of 40406709 is 90760404.

40406709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40406709 - 2⁵ = 40406677 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 (40406789) 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 7 ways as a sum of consecutive naturals, for example, 962044 + ... + 962085.

It is an arithmetic number, because the mean of its divisors is an integer number (7696520).

Almost surely, 2^40406709 is an apocalyptic number.

It is an amenable number.

40406709 is a deficient number, since it is larger than the sum of its proper divisors (21165451).

40406709 is a wasteful number, since it uses less digits than its factorization.

40406709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924139.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 40406709 is about 6356.6271717004. The cubic root of 40406709 is about 343.1503872378.

The spelling of 40406709 in words is "forty million, four hundred six thousand, seven hundred nine".