509847640 has 16 divisors (see below), whose sum is σ = 1147157280. Its totient is φ = 203939040.

The previous prime is 509847619. The next prime is 509847641. The reversal of 509847640 is 46748905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509847641) 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, 6373056 + ... + 6373135.

It is an arithmetic number, because the mean of its divisors is an integer number (71697330).

Almost surely, 2^509847640 is an apocalyptic number.

It is an amenable number.

509847640 is an abundant number, since it is smaller than the sum of its proper divisors (637309640).

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

509847640 is a wasteful number, since it uses less digits than its factorization.

509847640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12746202 (or 12746198 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 509847640 is about 22579.8060221960. The cubic root of 509847640 is about 798.8774046280.

The spelling of 509847640 in words is "five hundred nine million, eight hundred forty-seven thousand, six hundred forty".