648920 has 16 divisors (see below), whose sum is σ = 1460160. Its totient is φ = 259552.

The previous prime is 648917. The next prime is 648931. The reversal of 648920 is 29846.

It is a congruent number.

It is an unprimeable number.

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, 8072 + ... + 8151.

It is an arithmetic number, because the mean of its divisors is an integer number (91260).

2⁶⁴⁸⁹²⁰ is an apocalyptic number.

It is an amenable number.

648920 is an abundant number, since it is smaller than the sum of its proper divisors (811240).

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

648920 is a wasteful number, since it uses less digits than its factorization.

648920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16234 (or 16230 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 648920 is about 805.5557088122. Note that the first 3 decimals coincide. The cubic root of 648920 is about 86.5759076184.

The spelling of 648920 in words is "six hundred forty-eight thousand, nine hundred twenty".