1384740 has 108 divisors (see below), whose sum is σ = 4917276. Its totient is φ = 314496.

The previous prime is 1384727. The next prime is 1384741. The reversal of 1384740 is 474831.

It can be written as a sum of positive squares in 2 ways, for example, as 451584 + 933156 = 672^2 + 966^2 .

It is not an unprimeable number, because it can be changed into a prime (1384741) 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 35 ways as a sum of consecutive naturals, for example, 8742 + ... + 8898.

2^1384740 is an apocalyptic number.

1384740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1384740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2458638).

1384740 is an abundant number, since it is smaller than the sum of its proper divisors (3532536).

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

1384740 is a wasteful number, since it uses less digits than its factorization.

1384740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1384740 is about 1176.7497609942. The cubic root of 1384740 is about 111.4609514238.

Subtracting from 1384740 its reverse (474831), we obtain a palindrome (909909).

The spelling of 1384740 in words is "one million, three hundred eighty-four thousand, seven hundred forty".