509728142 has 16 divisors (see below), whose sum is σ = 953258112. Its totient is φ = 198595320.

The previous prime is 509728129. The next prime is 509728159. The reversal of 509728142 is 241827905.

It is a junction number, because it is equal to n+sod(n) for n = 509728096 and 509728105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654808 + ... + 1655115.

It is an arithmetic number, because the mean of its divisors is an integer number (59578632).

Almost surely, 2^509728142 is an apocalyptic number.

509728142 is a deficient number, since it is larger than the sum of its proper divisors (443529970).

509728142 is a wasteful number, since it uses less digits than its factorization.

509728142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309943.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 509728142 is about 22577.1597416504. The cubic root of 509728142 is about 798.8149861695.

The spelling of 509728142 in words is "five hundred nine million, seven hundred twenty-eight thousand, one hundred forty-two".