648550 has 48 divisors (see below), whose sum is σ = 1473120. Its totient is φ = 207360.

The previous prime is 648509. The next prime is 648563. The reversal of 648550 is 55846.

It is a congruent number.

It is an unprimeable number.

648550 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 23 ways as a sum of consecutive naturals, for example, 5896 + ... + 6004.

It is an arithmetic number, because the mean of its divisors is an integer number (30690).

2⁶⁴⁸⁵⁵⁰ is an apocalyptic number.

648550 is an abundant number, since it is smaller than the sum of its proper divisors (824570).

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

648550 is a wasteful number, since it uses less digits than its factorization.

648550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 648550 is about 805.3260209381. The cubic root of 648550 is about 86.5594499266.

Subtracting from 648550 its reverse (55846), we obtain a cube (592704 = 84³).

The spelling of 648550 in words is "six hundred forty-eight thousand, five hundred fifty".