1386644 has 12 divisors (see below), whose sum is σ = 2773344. Its totient is φ = 594264.

The previous prime is 1386643. The next prime is 1386659. The reversal of 1386644 is 4466831.

1386644 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1386644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386643) 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, 24734 + ... + 24789.

It is an arithmetic number, because the mean of its divisors is an integer number (231112).

2^1386644 is an apocalyptic number.

1386644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1386644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1386644 is a wasteful number, since it uses less digits than its factorization.

1386644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49534 (or 49532 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 1386644 is about 1177.5584911163. The cubic root of 1386644 is about 111.5120138275.

The spelling of 1386644 in words is "one million, three hundred eighty-six thousand, six hundred forty-four".