648278 has 16 divisors (see below), whose sum is σ = 1075680. Its totient is φ = 291456.

The previous prime is 648269. The next prime is 648283. The reversal of 648278 is 872846.

648278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368 + ... + 1196.

It is an arithmetic number, because the mean of its divisors is an integer number (67230).

2⁶⁴⁸²⁷⁸ is an apocalyptic number.

648278 is a deficient number, since it is larger than the sum of its proper divisors (427402).

648278 is a wasteful number, since it uses less digits than its factorization.

648278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871.

The product of its digits is 21504, while the sum is 35.

The square root of 648278 is about 805.1571275223. The cubic root of 648278 is about 86.5473473066.

It can be divided in two parts, 6 and 48278, that added together give a palindrome (48284).

The spelling of 648278 in words is "six hundred forty-eight thousand, two hundred seventy-eight".