648518 has 8 divisors (see below), whose sum is σ = 1047648. Its totient is φ = 299304.

The previous prime is 648509. The next prime is 648563. The reversal of 648518 is 815846.

648518 is nontrivially palindromic in base 12.

648518 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

648518 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 in 3 ways as a sum of consecutive naturals, for example, 12446 + ... + 12497.

It is an arithmetic number, because the mean of its divisors is an integer number (130956).

2⁶⁴⁸⁵¹⁸ is an apocalyptic number.

648518 is a deficient number, since it is larger than the sum of its proper divisors (399130).

648518 is a wasteful number, since it uses less digits than its factorization.

648518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24958.

The product of its digits is 7680, while the sum is 32.

The square root of 648518 is about 805.3061529630. The cubic root of 648518 is about 86.5580262646.

The spelling of 648518 in words is "six hundred forty-eight thousand, five hundred eighteen".