509947266 has 32 divisors (see below), whose sum is σ = 1098204480. Its totient is φ = 157270016.

The previous prime is 509947261. The next prime is 509947297. The reversal of 509947266 is 662749905.

It is not an unprimeable number, because it can be changed into a prime (509947261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36351 + ... + 48386.

It is an arithmetic number, because the mean of its divisors is an integer number (34318890).

Almost surely, 2^509947266 is an apocalyptic number.

509947266 is an abundant number, since it is smaller than the sum of its proper divisors (588257214).

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

509947266 is a wasteful number, since it uses less digits than its factorization.

509947266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84818.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 509947266 is about 22582.0120007053. The cubic root of 509947266 is about 798.9294357125.

The spelling of 509947266 in words is "five hundred nine million, nine hundred forty-seven thousand, two hundred sixty-six".