648788 has 48 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 247296.

The previous prime is 648779. The next prime is 648803. The reversal of 648788 is 887846.

It is a happy number.

648788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

648788 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 15 ways as a sum of consecutive naturals, for example, 13781 + ... + 13827.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2⁶⁴⁸⁷⁸⁸ is an apocalyptic number.

648788 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725760).

648788 is an abundant number, since it is smaller than the sum of its proper divisors (802732).

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

648788 is a wasteful number, since it uses less digits than its factorization.

648788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 102 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 648788 is about 805.4737736264. The cubic root of 648788 is about 86.5700369436.

The spelling of 648788 in words is "six hundred forty-eight thousand, seven hundred eighty-eight".