439986641 has 4 divisors (see below), whose sum is σ = 440059572. Its totient is φ = 439913712.

The previous prime is 439986623. The next prime is 439986643. The reversal of 439986641 is 146689934.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34810000 + 405176641 = 5900^2 + 20129^2 .

It is a cyclic number.

It is not a de Polignac number, because 439986641 - 2⁶ = 439986577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 439986641.

It is not an unprimeable number, because it can be changed into a prime (439986643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26510 + ... + 39783.

It is an arithmetic number, because the mean of its divisors is an integer number (110014893).

Almost surely, 2^439986641 is an apocalyptic number.

It is an amenable number.

439986641 is a deficient number, since it is larger than the sum of its proper divisors (72931).

439986641 is an equidigital number, since it uses as much as digits as its factorization.

439986641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72930.

The product of its digits is 1119744, while the sum is 50.

The square root of 439986641 is about 20975.8585283177. The cubic root of 439986641 is about 760.5827945529.

The spelling of 439986641 in words is "four hundred thirty-nine million, nine hundred eighty-six thousand, six hundred forty-one".