1388839 has 8 divisors (see below), whose sum is σ = 1456560. Its totient is φ = 1322496.

The previous prime is 1388837. The next prime is 1388873. The reversal of 1388839 is 9388831.

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

It is a cyclic number.

It is not a de Polignac number, because 1388839 - 2¹ = 1388837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2119 + ... + 2695.

It is an arithmetic number, because the mean of its divisors is an integer number (182070).

2^1388839 is an apocalyptic number.

1388839 is a deficient number, since it is larger than the sum of its proper divisors (67721).

1388839 is an equidigital number, since it uses as much as digits as its factorization.

1388839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689.

The product of its digits is 41472, while the sum is 40.

The square root of 1388839 is about 1178.4901357245. The cubic root of 1388839 is about 111.5708224404.

The spelling of 1388839 in words is "one million, three hundred eighty-eight thousand, eight hundred thirty-nine".