40644356 has 24 divisors (see below), whose sum is σ = 72820440. Its totient is φ = 19844352.

The previous prime is 40644349. The next prime is 40644367. The reversal of 40644356 is 65344604.

It can be written as a sum of positive squares in 4 ways, for example, as 13249600 + 27394756 = 3640^2 + 5234^2 .

It is an unprimeable number.

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, 31190 + ... + 32466.

It is an arithmetic number, because the mean of its divisors is an integer number (3034185).

Almost surely, 2^40644356 is an apocalyptic number.

It is an amenable number.

40644356 is a deficient number, since it is larger than the sum of its proper divisors (32176084).

40644356 is a wasteful number, since it uses less digits than its factorization.

40644356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463 (or 1461 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 40644356 is about 6375.2926207351. The cubic root of 40644356 is about 343.8218046804.

The spelling of 40644356 in words is "forty million, six hundred forty-four thousand, three hundred fifty-six".