509802312 has 16 divisors (see below), whose sum is σ = 1274505840. Its totient is φ = 169934096.

The previous prime is 509802301. The next prime is 509802329. The reversal of 509802312 is 213208905.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 509802312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10620858 + ... + 10620905.

It is an arithmetic number, because the mean of its divisors is an integer number (79656615).

Almost surely, 2^509802312 is an apocalyptic number.

It is an amenable number.

509802312 is an abundant number, since it is smaller than the sum of its proper divisors (764703528).

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

509802312 is a wasteful number, since it uses less digits than its factorization.

509802312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21241772 (or 21241768 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 509802312 is about 22578.8022711569. The cubic root of 509802312 is about 798.8537291968.

The spelling of 509802312 in words is "five hundred nine million, eight hundred two thousand, three hundred twelve".