648578 has 8 divisors (see below), whose sum is σ = 1111872. Its totient is φ = 277956.

The previous prime is 648563. The next prime is 648607. The reversal of 648578 is 875846.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23150 + ... + 23177.

It is an arithmetic number, because the mean of its divisors is an integer number (138984).

2⁶⁴⁸⁵⁷⁸ is an apocalyptic number.

648578 is a deficient number, since it is larger than the sum of its proper divisors (463294).

648578 is a wasteful number, since it uses less digits than its factorization.

648578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46336.

The product of its digits is 53760, while the sum is 38.

The square root of 648578 is about 805.3434050143. The cubic root of 648578 is about 86.5606955925.

It can be divided in two parts, 648 and 578, that multiplied together give a square (374544 = 612²).

The spelling of 648578 in words is "six hundred forty-eight thousand, five hundred seventy-eight".