1378839 has 32 divisors (see below), whose sum is σ = 2359296. Its totient is φ = 695520.

The previous prime is 1378831. The next prime is 1378841. The reversal of 1378839 is 9388731.

It is not a de Polignac number, because 1378839 - 2³ = 1378831 is a prime.

It is a super-3 number, since 3×1378839³ = 7864333660884011157, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1378797 and 1378806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10794 + ... + 10920.

It is an arithmetic number, because the mean of its divisors is an integer number (73728).

2^1378839 is an apocalyptic number.

1378839 is a deficient number, since it is larger than the sum of its proper divisors (980457).

1378839 is a wasteful number, since it uses less digits than its factorization.

1378839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195.

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

The square root of 1378839 is about 1174.2397540537. The cubic root of 1378839 is about 111.3023975705.

The spelling of 1378839 in words is "one million, three hundred seventy-eight thousand, eight hundred thirty-nine".