4444444381 has 4 divisors (see below), whose sum is σ = 4786324732. Its totient is φ = 4102564032.

The previous prime is 4444444369. The next prime is 4444444393. The reversal of 4444444381 is 1834444444.

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

It is an interprime number because it is at equal distance from previous prime (4444444369) and next prime (4444444393).

It can be written as a sum of positive squares in 2 ways, for example, as 2739580281 + 1704864100 = 52341^2 + 41290^2 .

It is a cyclic number.

It is not a de Polignac number, because 4444444381 - 2⁵ = 4444444349 is a prime.

It is a super-2 number, since 2×4444444381² = 39506171711604946322, 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 (4444444481) 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, 170940156 + ... + 170940181.

It is an arithmetic number, because the mean of its divisors is an integer number (1196581183).

Almost surely, 2^4444444381 is an apocalyptic number.

It is an amenable number.

4444444381 is a deficient number, since it is larger than the sum of its proper divisors (341880351).

4444444381 is a wasteful number, since it uses less digits than its factorization.

4444444381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341880350.

The product of its digits is 393216, while the sum is 40.

The square root of 4444444381 is about 66666.6661908333. Note that the first 3 decimals coincide. The cubic root of 4444444381 is about 1644.1413750636.

The spelling of 4444444381 in words is "four billion, four hundred forty-four million, four hundred forty-four thousand, three hundred eighty-one".