647340 has 24 divisors (see below), whose sum is σ = 1812720. Its totient is φ = 172608.

The previous prime is 647333. The next prime is 647341. The reversal of 647340 is 43746.

It is a self number, because there is not a number n which added to its sum of digits gives 647340.

It is not an unprimeable number, because it can be changed into a prime (647341) by changing a digit.

647340 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5335 + ... + 5454.

It is an arithmetic number, because the mean of its divisors is an integer number (75530).

2⁶⁴⁷³⁴⁰ is an apocalyptic number.

647340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

647340 is an abundant number, since it is smaller than the sum of its proper divisors (1165380).

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

647340 is a wasteful number, since it uses less digits than its factorization.

647340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10801 (or 10799 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 647340 is about 804.5744216665. The cubic root of 647340 is about 86.5055850805.

The spelling of 647340 in words is "six hundred forty-seven thousand, three hundred forty".