648764 has 12 divisors (see below), whose sum is σ = 1155000. Its totient is φ = 318768.

The previous prime is 648763. The next prime is 648779. The reversal of 648764 is 467846.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648764.

It is not an unprimeable number, because it can be changed into a prime (648763) by changing a digit.

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, 1139 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (96250).

2⁶⁴⁸⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

648764 is a deficient number, since it is larger than the sum of its proper divisors (506236).

648764 is a wasteful number, since it uses less digits than its factorization.

648764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812 (or 2810 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 648764 is about 805.4588754244. The cubic root of 648764 is about 86.5689694627.

The spelling of 648764 in words is "six hundred forty-eight thousand, seven hundred sixty-four".