509135444 has 12 divisors (see below), whose sum is σ = 919728768. Its totient is φ = 246355800.

The previous prime is 509135441. The next prime is 509135449. The reversal of 509135444 is 444531905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509135441) 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, 2052842 + ... + 2053089.

It is an arithmetic number, because the mean of its divisors is an integer number (76644064).

Almost surely, 2^509135444 is an apocalyptic number.

It is an amenable number.

509135444 is a deficient number, since it is larger than the sum of its proper divisors (410593324).

509135444 is a wasteful number, since it uses less digits than its factorization.

509135444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105966 (or 4105964 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 509135444 is about 22564.0298705705. The cubic root of 509135444 is about 798.5052526524.

The spelling of 509135444 in words is "five hundred nine million, one hundred thirty-five thousand, four hundred forty-four".