648420 has 48 divisors (see below), whose sum is σ = 1850688. Its totient is φ = 169600.

The previous prime is 648391. The next prime is 648433. The reversal of 648420 is 24846.

648420 = T₅₉ + T₆₀ + ... + T₁₅₉.

648420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

648420 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, 6007 + ... + 6113.

It is an arithmetic number, because the mean of its divisors is an integer number (38556).

2⁶⁴⁸⁴²⁰ is an apocalyptic number.

648420 is a gapful number since it is divisible by the number (60) 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 648420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925344).

648420 is an abundant number, since it is smaller than the sum of its proper divisors (1202268).

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

648420 is a wasteful number, since it uses less digits than its factorization.

648420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 648420 is about 805.2453042396. The cubic root of 648420 is about 86.5536660084.

The spelling of 648420 in words is "six hundred forty-eight thousand, four hundred twenty".