1378668 has 12 divisors (see below), whose sum is σ = 3216920. Its totient is φ = 459552.

The previous prime is 1378639. The next prime is 1378669. The reversal of 1378668 is 8668731.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1378669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57433 + ... + 57456.

2^1378668 is an apocalyptic number.

It is an amenable number.

1378668 is an abundant number, since it is smaller than the sum of its proper divisors (1838252).

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

1378668 is a wasteful number, since it uses less digits than its factorization.

1378668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114896 (or 114894 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 1378668 is about 1174.1669387272. The cubic root of 1378668 is about 111.2977962364.

The spelling of 1378668 in words is "one million, three hundred seventy-eight thousand, six hundred sixty-eight".