648870 has 32 divisors (see below), whose sum is σ = 1596672. Its totient is φ = 168672.

The previous prime is 648863. The next prime is 648871. The reversal of 648870 is 78846.

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 648870.

It is not an unprimeable number, because it can be changed into a prime (648871) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1039 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2⁶⁴⁸⁸⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798336).

648870 is an abundant number, since it is smaller than the sum of its proper divisors (947802).

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

648870 is a wasteful number, since it uses less digits than its factorization.

648870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 648870 is about 805.5246737376. The cubic root of 648870 is about 86.5736839716.

The spelling of 648870 in words is "six hundred forty-eight thousand, eight hundred seventy".