4405039981 has 4 divisors (see below), whose sum is σ = 4405523292. Its totient is φ = 4404556672.

The previous prime is 4405039967. The next prime is 4405039997. The reversal of 4405039981 is 1899305044.

It is a happy number.

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 1473792100 + 2931247881 = 38390^2 + 54141^2 .

It is a cyclic number.

It is not a de Polignac number, because 4405039981 - 2⁷ = 4405039853 is a prime.

It is a super-2 number, since 2×4405039981² = 38808754468416960722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4405039931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227716 + ... + 246301.

It is an arithmetic number, because the mean of its divisors is an integer number (1101380823).

Almost surely, 2^4405039981 is an apocalyptic number.

It is an amenable number.

4405039981 is a deficient number, since it is larger than the sum of its proper divisors (483311).

4405039981 is an equidigital number, since it uses as much as digits as its factorization.

4405039981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483310.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 4405039981 is about 66370.4752205376. The cubic root of 4405039981 is about 1639.2679636224.

The spelling of 4405039981 in words is "four billion, four hundred five million, thirty-nine thousand, nine hundred eighty-one".