40649109 has 8 divisors (see below), whose sum is σ = 54442752. Its totient is φ = 26977440.

The previous prime is 40649107. The next prime is 40649123. The reversal of 40649109 is 90194604.

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

It is not a de Polignac number, because 40649109 - 2¹ = 40649107 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40649109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40649107) 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, 29712 + ... + 31049.

It is an arithmetic number, because the mean of its divisors is an integer number (6805344).

Almost surely, 2^40649109 is an apocalyptic number.

It is an amenable number.

40649109 is a deficient number, since it is larger than the sum of its proper divisors (13793643).

40649109 is a wasteful number, since it uses less digits than its factorization.

40649109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60987.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 40649109 is about 6375.6653770411. The cubic root of 40649109 is about 343.8352064701.

The spelling of 40649109 in words is "forty million, six hundred forty-nine thousand, one hundred nine".