647009268 has 24 divisors (see below), whose sum is σ = 1510186272. Its totient is φ = 215598624.

The previous prime is 647009243. The next prime is 647009287. The reversal of 647009268 is 862900746.

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, 39571 + ... + 53477.

It is an arithmetic number, because the mean of its divisors is an integer number (62924428).

Almost surely, 2^647009268 is an apocalyptic number.

It is an amenable number.

647009268 is an abundant number, since it is smaller than the sum of its proper divisors (863177004).

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

647009268 is a wasteful number, since it uses less digits than its factorization.

647009268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17791 (or 17789 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 647009268 is about 25436.3768646401. The cubic root of 647009268 is about 864.9085040269.

The spelling of 647009268 in words is "six hundred forty-seven million, nine thousand, two hundred sixty-eight".