40640149 has 24 divisors (see below), whose sum is σ = 49412160. Its totient is φ = 33221760.

The previous prime is 40640137. The next prime is 40640153. The reversal of 40640149 is 94104604.

40640149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40640149 - 2⁹ = 40639637 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 (40640129) 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 23 ways as a sum of consecutive naturals, for example, 46882 + ... + 47740.

It is an arithmetic number, because the mean of its divisors is an integer number (2058840).

Almost surely, 2^40640149 is an apocalyptic number.

It is an amenable number.

40640149 is a deficient number, since it is larger than the sum of its proper divisors (8772011).

40640149 is a wasteful number, since it uses less digits than its factorization.

40640149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40640149 is about 6374.9626665574. The cubic root of 40640149 is about 343.8099415471.

The spelling of 40640149 in words is "forty million, six hundred forty thousand, one hundred forty-nine".