40644733 has 2 divisors, whose sum is σ = 40644734. Its totient is φ = 40644732.

The previous prime is 40644713. The next prime is 40644757. The reversal of 40644733 is 33744604.

40644733 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39917124 + 727609 = 6318^2 + 853^2 .

It is a cyclic number.

It is not a de Polignac number, because 40644733 - 2¹⁷ = 40513661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40644695 and 40644704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40644713) 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 as a sum of consecutive naturals, namely, 20322366 + 20322367.

It is an arithmetic number, because the mean of its divisors is an integer number (20322367).

Almost surely, 2^40644733 is an apocalyptic number.

It is an amenable number.

40644733 is a deficient number, since it is larger than the sum of its proper divisors (1).

40644733 is an equidigital number, since it uses as much as digits as its factorization.

40644733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 31.

The square root of 40644733 is about 6375.3221879369. The cubic root of 40644733 is about 343.8228677260.

The spelling of 40644733 in words is "forty million, six hundred forty-four thousand, seven hundred thirty-three".