684148 has 12 divisors (see below), whose sum is σ = 1267812. Its totient is φ = 321920.

The previous prime is 684127. The next prime is 684157. The reversal of 684148 is 841486.

It can be written as a sum of positive squares in 2 ways, for example, as 465124 + 219024 = 682^2 + 468^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

684148 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, 4963 + ... + 5098.

It is an arithmetic number, because the mean of its divisors is an integer number (105651).

2⁶⁸⁴¹⁴⁸ is an apocalyptic number.

684148 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

684148 is a deficient number, since it is larger than the sum of its proper divisors (583664).

684148 is a wasteful number, since it uses less digits than its factorization.

684148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10082 (or 10080 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 684148 is about 827.1323956901. The cubic root of 684148 is about 88.1150355080.

It can be divided in two parts, 6841 and 48, that added together give a square (6889 = 83²).

The spelling of 684148 in words is "six hundred eighty-four thousand, one hundred forty-eight".