648828 has 36 divisors (see below), whose sum is σ = 1670760. Its totient is φ = 212256.

The previous prime is 648803. The next prime is 648841. The reversal of 648828 is 828846.

648828 is a `hidden beast` number, since 648 + 8 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 648792 and 648801.

It is a congruent number.

It is an unprimeable number.

648828 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, 2278 + ... + 2546.

It is an arithmetic number, because the mean of its divisors is an integer number (46410).

2⁶⁴⁸⁸²⁸ 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 648828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835380).

648828 is an abundant number, since it is smaller than the sum of its proper divisors (1021932).

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

648828 is a wasteful number, since it uses less digits than its factorization.

648828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 341 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 648828 is about 805.4986033507. The cubic root of 648828 is about 86.5718160200.

The spelling of 648828 in words is "six hundred forty-eight thousand, eight hundred twenty-eight".