1389886 has 8 divisors (see below), whose sum is σ = 2207520. Its totient is φ = 654048.

The previous prime is 1389877. The next prime is 1389887. The reversal of 1389886 is 6889831.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 20406 + ... + 20473.

It is an arithmetic number, because the mean of its divisors is an integer number (275940).

2^1389886 is an apocalyptic number.

1389886 is a deficient number, since it is larger than the sum of its proper divisors (817634).

1389886 is a wasteful number, since it uses less digits than its factorization.

1389886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40898.

The product of its digits is 82944, while the sum is 43.

The square root of 1389886 is about 1178.9342644948. The cubic root of 1389886 is about 111.5988519214.

Subtracting 1389886 from its reverse (6889831), we obtain a palindrome (5499945).

The spelling of 1389886 in words is "one million, three hundred eighty-nine thousand, eight hundred eighty-six".