1389885 has 48 divisors (see below), whose sum is σ = 2714112. Its totient is φ = 604800.

The previous prime is 1389877. The next prime is 1389887. The reversal of 1389885 is 5889831.

It is not a de Polignac number, because 1389885 - 2³ = 1389877 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389887) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22755 + ... + 22815.

It is an arithmetic number, because the mean of its divisors is an integer number (56544).

2^1389885 is an apocalyptic number.

1389885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1389885 is a deficient number, since it is larger than the sum of its proper divisors (1324227).

1389885 is a wasteful number, since it uses less digits than its factorization.

1389885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 107 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 1389885 is about 1178.9338403829. The cubic root of 1389885 is about 111.5988251569.

It can be divided in two parts, 13 and 89885, that added together give a palindrome (89898).

The spelling of 1389885 in words is "one million, three hundred eighty-nine thousand, eight hundred eighty-five".