648068 has 6 divisors (see below), whose sum is σ = 1134126. Its totient is φ = 324032.

The previous prime is 648061. The next prime is 648073. The reversal of 648068 is 860846.

It can be written as a sum of positive squares in only one way, i.e., 473344 + 174724 = 688^2 + 418^2 .

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648068.

It is not an unprimeable number, because it can be changed into a prime (648061) by changing a digit.

648068 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 as a sum of consecutive naturals, namely, 81005 + ... + 81012.

It is an arithmetic number, because the mean of its divisors is an integer number (189021).

2⁶⁴⁸⁰⁶⁸ is an apocalyptic number.

It is an amenable number.

648068 is a deficient number, since it is larger than the sum of its proper divisors (486058).

648068 is a wasteful number, since it uses less digits than its factorization.

648068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162021 (or 162019 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 648068 is about 805.0267076315. The cubic root of 648068 is about 86.5380010561.

The spelling of 648068 in words is "six hundred forty-eight thousand, sixty-eight".