648626 has 8 divisors (see below), whose sum is σ = 1061424. Its totient is φ = 294820.

The previous prime is 648619. The next prime is 648629. The reversal of 648626 is 626846.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 648592 and 648601.

It is not an unprimeable number, because it can be changed into a prime (648629) by changing a digit.

648626 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14720 + ... + 14763.

It is an arithmetic number, because the mean of its divisors is an integer number (132678).

2⁶⁴⁸⁶²⁶ is an apocalyptic number.

648626 is a deficient number, since it is larger than the sum of its proper divisors (412798).

648626 is a wasteful number, since it uses less digits than its factorization.

648626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29496.

The product of its digits is 13824, while the sum is 32.

The square root of 648626 is about 805.3732054147. The cubic root of 648626 is about 86.5628309362.

The spelling of 648626 in words is "six hundred forty-eight thousand, six hundred twenty-six".