647836252 has 18 divisors (see below), whose sum is σ = 1318809912. Its totient is φ = 277644024.

The previous prime is 647836247. The next prime is 647836303. The reversal of 647836252 is 252638746.

647836252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 647836199 and 647836208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1652448 + ... + 1652839.

Almost surely, 2^647836252 is an apocalyptic number.

It is an amenable number.

647836252 is an abundant number, since it is smaller than the sum of its proper divisors (670973660).

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

647836252 is a wasteful number, since it uses less digits than its factorization.

647836252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305305 (or 3305296 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 647836252 is about 25452.6276050234. The cubic root of 647836252 is about 865.2768454628.

The spelling of 647836252 in words is "six hundred forty-seven million, eight hundred thirty-six thousand, two hundred fifty-two".