518444244 has 36 divisors (see below), whose sum is σ = 1311226644. Its totient is φ = 172720512.

The previous prime is 518444237. The next prime is 518444287. The reversal of 518444244 is 442444815.

It can be written as a sum of positive squares in 2 ways, for example, as 422795844 + 95648400 = 20562^2 + 9780^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 518444199 and 518444208.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 102544 + ... + 107480.

Almost surely, 2^518444244 is an apocalyptic number.

It is an amenable number.

518444244 is an abundant number, since it is smaller than the sum of its proper divisors (792782400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

518444244 is a wasteful number, since it uses less digits than its factorization.

518444244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864 (or 7859 counting only the distinct ones).

The product of its digits is 81920, while the sum is 36.

The square root of 518444244 is about 22769.3707422933. The cubic root of 518444244 is about 803.3423931456.

The spelling of 518444244 in words is "five hundred eighteen million, four hundred forty-four thousand, two hundred forty-four".