1668368 has 30 divisors (see below), whose sum is σ = 3505914. Its totient is φ = 768768.

The previous prime is 1668361. The next prime is 1668379. The reversal of 1668368 is 8638661.

It can be written as a sum of positive squares in 3 ways, for example, as 150544 + 1517824 = 388^2 + 1232^2 .

It is not an unprimeable number, because it can be changed into a prime (1668361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2396 + ... + 3012.

2^1668368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752957).

1668368 is an abundant number, since it is smaller than the sum of its proper divisors (1837546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668368 is a wasteful number, since it uses less digits than its factorization.

1668368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 632 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 1668368 is about 1291.6532042309. The cubic root of 1668368 is about 118.6034395043.

The spelling of 1668368 in words is "one million, six hundred sixty-eight thousand, three hundred sixty-eight".