648678 has 16 divisors (see below), whose sum is σ = 1316016. Its totient is φ = 213120.

The previous prime is 648677. The next prime is 648689. The reversal of 648678 is 876846.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303 + ... + 1178.

It is an arithmetic number, because the mean of its divisors is an integer number (82251).

2⁶⁴⁸⁶⁷⁸ is an apocalyptic number.

648678 is an abundant number, since it is smaller than the sum of its proper divisors (667338).

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

648678 is a wasteful number, since it uses less digits than its factorization.

648678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559.

The product of its digits is 64512, while the sum is 39.

The square root of 648678 is about 805.4054879376. The cubic root of 648678 is about 86.5651441064.

It can be divided in two parts, 648 and 678, that added together give a triangular number (1326 = T₅₁).

The spelling of 648678 in words is "six hundred forty-eight thousand, six hundred seventy-eight".