1385744 has 20 divisors (see below), whose sum is σ = 2703324. Its totient is φ = 688128.

The previous prime is 1385743. The next prime is 1385749. The reversal of 1385744 is 4475831.

It can be written as a sum of positive squares in 2 ways, for example, as 976144 + 409600 = 988^2 + 640^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385744.

It is not an unprimeable number, because it can be changed into a prime (1385743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3944 + ... + 4280.

2^1385744 is an apocalyptic number.

It is an amenable number.

1385744 is a deficient number, since it is larger than the sum of its proper divisors (1317580).

1385744 is a wasteful number, since it uses less digits than its factorization.

1385744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 596 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 1385744 is about 1177.1762824658. The cubic root of 1385744 is about 111.4878830164.

The spelling of 1385744 in words is "one million, three hundred eighty-five thousand, seven hundred forty-four".