647630 has 8 divisors (see below), whose sum is σ = 1165752. Its totient is φ = 259048.

The previous prime is 647627. The next prime is 647641. The reversal of 647630 is 36746.

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

It is a self number, because there is not a number n which added to its sum of digits gives 647630.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32372 + ... + 32391.

It is an arithmetic number, because the mean of its divisors is an integer number (145719).

2⁶⁴⁷⁶³⁰ is an apocalyptic number.

647630 is a deficient number, since it is larger than the sum of its proper divisors (518122).

647630 is a wasteful number, since it uses less digits than its factorization.

647630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64770.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 647630 is about 804.7546209870. The cubic root of 647630 is about 86.5185009487.

The spelling of 647630 in words is "six hundred forty-seven thousand, six hundred thirty".