1385784 has 48 divisors (see below), whose sum is σ = 3954600. Its totient is φ = 437184.

The previous prime is 1385779. The next prime is 1385801. The reversal of 1385784 is 4875831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 862 + ... + 1874.

2^1385784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1977300).

1385784 is an abundant number, since it is smaller than the sum of its proper divisors (2568816).

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

1385784 is a wasteful number, since it uses less digits than its factorization.

1385784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044 (or 1037 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 1385784 is about 1177.1932721520. The cubic root of 1385784 is about 111.4889557187.

The spelling of 1385784 in words is "one million, three hundred eighty-five thousand, seven hundred eighty-four".