648786 has 8 divisors (see below), whose sum is σ = 1297584. Its totient is φ = 216260.

The previous prime is 648779. The next prime is 648803. The reversal of 648786 is 687846.

648786 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.

648786 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

648786 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 3 ways as a sum of consecutive naturals, for example, 54060 + ... + 54071.

It is an arithmetic number, because the mean of its divisors is an integer number (162198).

2⁶⁴⁸⁷⁸⁶ is an apocalyptic number.

648786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

648786 is a wasteful number, since it uses less digits than its factorization.

648786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108136.

The product of its digits is 64512, while the sum is 39.

The square root of 648786 is about 805.4725321201. The cubic root of 648786 is about 86.5699479879.

Subtracting 648786 from its reverse (687846), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 648786 in words is "six hundred forty-eight thousand, seven hundred eighty-six".