509449944 has 16 divisors (see below), whose sum is σ = 1273624920. Its totient is φ = 169816640.

The previous prime is 509449901. The next prime is 509449957. The reversal of 509449944 is 449944905.

It is a junction number, because it is equal to n+sod(n) for n = 509449893 and 509449902.

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 3 ways as a sum of consecutive naturals, for example, 10613517 + ... + 10613564.

Almost surely, 2^509449944 is an apocalyptic number.

It is an amenable number.

509449944 is an abundant number, since it is smaller than the sum of its proper divisors (764174976).

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

509449944 is a wasteful number, since it uses less digits than its factorization.

509449944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21227090 (or 21227086 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 509449944 is about 22570.9978512249. The cubic root of 509449944 is about 798.6696347200.

The spelling of 509449944 in words is "five hundred nine million, four hundred forty-nine thousand, nine hundred forty-four".