647830 has 8 divisors (see below), whose sum is σ = 1166112. Its totient is φ = 259128.

The previous prime is 647821. The next prime is 647837. The reversal of 647830 is 38746.

647830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647837) 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, 32382 + ... + 32401.

It is an arithmetic number, because the mean of its divisors is an integer number (145764).

2⁶⁴⁷⁸³⁰ is an apocalyptic number.

647830 is a deficient number, since it is larger than the sum of its proper divisors (518282).

647830 is a wasteful number, since it uses less digits than its factorization.

647830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64790.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 647830 is about 804.8788728747. The cubic root of 647830 is about 86.5274061977.

The spelling of 647830 in words is "six hundred forty-seven thousand, eight hundred thirty".