3986440321 has 2 divisors, whose sum is σ = 3986440322. Its totient is φ = 3986440320.

The previous prime is 3986440309. The next prime is 3986440333. The reversal of 3986440321 is 1230446893.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (3986440309) and next prime (3986440333).

It can be written as a sum of positive squares in only one way, i.e., 3936935025 + 49505296 = 62745^2 + 7036^2 .

It is a cyclic number.

It is not a de Polignac number, because 3986440321 - 2¹⁵ = 3986407553 is a prime.

It is not a weakly prime, because it can be changed into another prime (3986440301) 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, 1993220160 + 1993220161.

It is an arithmetic number, because the mean of its divisors is an integer number (1993220161).

Almost surely, 2^3986440321 is an apocalyptic number.

It is an amenable number.

3986440321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3986440321 is an equidigital number, since it uses as much as digits as its factorization.

3986440321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 3986440321 is about 63138.2635253774. The cubic root of 3986440321 is about 1585.6053005602.

The spelling of 3986440321 in words is "three billion, nine hundred eighty-six million, four hundred forty thousand, three hundred twenty-one".