1385644 has 12 divisors (see below), whose sum is σ = 2611504. Its totient is φ = 639504.

The previous prime is 1385621. The next prime is 1385647. The reversal of 1385644 is 4465831.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385647) 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, 13272 + ... + 13375.

2^1385644 is an apocalyptic number.

It is an amenable number.

1385644 is a deficient number, since it is larger than the sum of its proper divisors (1225860).

1385644 is a wasteful number, since it uses less digits than its factorization.

1385644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26664 (or 26662 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 1385644 is about 1177.1338071774. The cubic root of 1385644 is about 111.4852011702.

The spelling of 1385644 in words is "one million, three hundred eighty-five thousand, six hundred forty-four".