1389646 has 16 divisors (see below), whose sum is σ = 2175120. Its totient is φ = 665280.

The previous prime is 1389643. The next prime is 1389667. The reversal of 1389646 is 6469831.

It is a super-2 number, since 2×1389646² = 3862232010632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389643) 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, 6481 + ... + 6691.

It is an arithmetic number, because the mean of its divisors is an integer number (135945).

2^1389646 is an apocalyptic number.

1389646 is a deficient number, since it is larger than the sum of its proper divisors (785474).

1389646 is a wasteful number, since it uses less digits than its factorization.

1389646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339.

The product of its digits is 31104, while the sum is 37.

The square root of 1389646 is about 1178.8324732548. The cubic root of 1389646 is about 111.5924280693.

The spelling of 1389646 in words is "one million, three hundred eighty-nine thousand, six hundred forty-six".