40645849 has 8 divisors (see below), whose sum is σ = 42118920. Its totient is φ = 39177600.

The previous prime is 40645841. The next prime is 40645873. The reversal of 40645849 is 94854604.

40645849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 18490000 + 22155849 = 4300^2 + 4707^2 .

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 40645849 - 2³ = 40645841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40645841) 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, 30109 + ... + 31429.

It is an arithmetic number, because the mean of its divisors is an integer number (5264865).

Almost surely, 2^40645849 is an apocalyptic number.

It is an amenable number.

40645849 is a deficient number, since it is larger than the sum of its proper divisors (1473071).

40645849 is a wasteful number, since it uses less digits than its factorization.

40645849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 40645849 is about 6375.4097123244. The cubic root of 40645849 is about 343.8260145283.

The spelling of 40645849 in words is "forty million, six hundred forty-five thousand, eight hundred forty-nine".