648760 has 48 divisors (see below), whose sum is σ = 1703160. Its totient is φ = 221760.

The previous prime is 648731. The next prime is 648763. The reversal of 648760 is 67846.

648760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

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

648760 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 11 ways as a sum of consecutive naturals, for example, 1795 + ... + 2125.

2⁶⁴⁸⁷⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851580).

648760 is an abundant number, since it is smaller than the sum of its proper divisors (1054400).

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

648760 is a wasteful number, since it uses less digits than its factorization.

648760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 648760 is about 805.4563923640. The cubic root of 648760 is about 86.5687915466.

The spelling of 648760 in words is "six hundred forty-eight thousand, seven hundred sixty".