647320 has 16 divisors (see below), whose sum is σ = 1456560. Its totient is φ = 258912.

The previous prime is 647303. The next prime is 647321. The reversal of 647320 is 23746.

It is a junction number, because it is equal to n+sod(n) for n = 647291 and 647300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647321) 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, 8052 + ... + 8131.

It is an arithmetic number, because the mean of its divisors is an integer number (91035).

2⁶⁴⁷³²⁰ is an apocalyptic number.

It is an amenable number.

647320 is an abundant number, since it is smaller than the sum of its proper divisors (809240).

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

647320 is a wasteful number, since it uses less digits than its factorization.

647320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16194 (or 16190 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 647320 is about 804.5619926395. The cubic root of 647320 is about 86.5046941888.

The spelling of 647320 in words is "six hundred forty-seven thousand, three hundred twenty".