648670 has 16 divisors (see below), whose sum is σ = 1273968. Its totient is φ = 235840.

The previous prime is 648653. The next prime is 648671. The reversal of 648670 is 76846.

It is a congruent number.

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

648670 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2839 + ... + 3058.

It is an arithmetic number, because the mean of its divisors is an integer number (79623).

2⁶⁴⁸⁶⁷⁰ is an apocalyptic number.

648670 is a deficient number, since it is larger than the sum of its proper divisors (625298).

648670 is a wasteful number, since it uses less digits than its factorization.

648670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5915.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 648670 is about 805.4005214798. The cubic root of 648670 is about 86.5647882421.

It can be divided in two parts, 6486 and 70, that added together give a palindrome (6556).

The spelling of 648670 in words is "six hundred forty-eight thousand, six hundred seventy".