1378386 has 24 divisors (see below), whose sum is σ = 3030300. Its totient is φ = 452736.

The previous prime is 1378373. The next prime is 1378387. The reversal of 1378386 is 6838731.

It can be written as a sum of positive squares in 2 ways, for example, as 1279161 + 99225 = 1131^2 + 315^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1378386.

It is not an unprimeable number, because it can be changed into a prime (1378387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 790 + ... + 1838.

2^1378386 is an apocalyptic number.

1378386 is an abundant number, since it is smaller than the sum of its proper divisors (1651914).

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

1378386 is a wasteful number, since it uses less digits than its factorization.

1378386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130 (or 1127 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1378386 is about 1174.0468474469. The cubic root of 1378386 is about 111.2902072402.

It can be divided in two parts, 1378 and 386, that added together give a square (1764 = 42²).

The spelling of 1378386 in words is "one million, three hundred seventy-eight thousand, three hundred eighty-six".