1386378 has 24 divisors (see below), whose sum is σ = 3433248. Its totient is φ = 396072.

The previous prime is 1386377. The next prime is 1386379. The reversal of 1386378 is 8736831.

1386378 is a `hidden beast` number, since 13 + 8 + 637 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1386377) and next prime (1386379).

It is not an unprimeable number, because it can be changed into a prime (1386377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5376 + ... + 5627.

It is an arithmetic number, because the mean of its divisors is an integer number (143052).

2^1386378 is an apocalyptic number.

1386378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1386378 is an abundant number, since it is smaller than the sum of its proper divisors (2046870).

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

1386378 is a wasteful number, since it uses less digits than its factorization.

1386378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11018 (or 11015 counting only the distinct ones).

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

The square root of 1386378 is about 1177.4455401419. The cubic root of 1386378 is about 111.5048829194.

It can be divided in two parts, 1386 and 378, that added together give a square (1764 = 42²).

The spelling of 1386378 in words is "one million, three hundred eighty-six thousand, three hundred seventy-eight".