1389378 has 8 divisors (see below), whose sum is σ = 2778768. Its totient is φ = 463124.

The previous prime is 1389371. The next prime is 1389383. The reversal of 1389378 is 8739831.

It is a sphenic number, since it is the product of 3 distinct primes.

1389378 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1389371) 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, 115776 + ... + 115787.

It is an arithmetic number, because the mean of its divisors is an integer number (347346).

2^1389378 is an apocalyptic number.

1389378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1389378 is a wasteful number, since it uses less digits than its factorization.

1389378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231568.

The product of its digits is 36288, while the sum is 39.

The square root of 1389378 is about 1178.7187959815. The cubic root of 1389378 is about 111.5852538937.

The spelling of 1389378 in words is "one million, three hundred eighty-nine thousand, three hundred seventy-eight".