40644149 has 16 divisors (see below), whose sum is σ = 50201088. Its totient is φ = 32044032.

The previous prime is 40644139. The next prime is 40644169. The reversal of 40644149 is 94144604.

40644149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40644149 - 2⁴ = 40644133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40644119) 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 15 ways as a sum of consecutive naturals, for example, 32789 + ... + 34005.

It is an arithmetic number, because the mean of its divisors is an integer number (3137568).

Almost surely, 2^40644149 is an apocalyptic number.

It is an amenable number.

40644149 is a deficient number, since it is larger than the sum of its proper divisors (9556939).

40644149 is a wasteful number, since it uses less digits than its factorization.

40644149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 40644149 is about 6375.2763861655. The cubic root of 40644149 is about 343.8212209894.

The spelling of 40644149 in words is "forty million, six hundred forty-four thousand, one hundred forty-nine".