3644430389 has 2 divisors, whose sum is σ = 3644430390. Its totient is φ = 3644430388.

The previous prime is 3644430371. The next prime is 3644430469. The reversal of 3644430389 is 9830344463.

3644430389 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., 2657402500 + 987027889 = 51550^2 + 31417^2 .

It is a cyclic number.

It is not a de Polignac number, because 3644430389 - 2²⁸ = 3375994933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3644430689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822215194 + 1822215195.

It is an arithmetic number, because the mean of its divisors is an integer number (1822215195).

Almost surely, 2^3644430389 is an apocalyptic number.

It is an amenable number.

3644430389 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644430389 is an equidigital number, since it uses as much as digits as its factorization.

3644430389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 44.

The square root of 3644430389 is about 60369.1178418237. The cubic root of 3644430389 is about 1538.8981814863.

The spelling of 3644430389 in words is "three billion, six hundred forty-four million, four hundred thirty thousand, three hundred eighty-nine".