1303840 has 48 divisors (see below), whose sum is σ = 3197880. Its totient is φ = 501760.

The previous prime is 1303831. The next prime is 1303859. The reversal of 1303840 is 483031.

It can be written as a sum of positive squares in 4 ways, for example, as 1140624 + 163216 = 1068^2 + 404^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4500 + ... + 4780.

2^1303840 is an apocalyptic number.

1303840 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 1303840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1598940).

1303840 is an abundant number, since it is smaller than the sum of its proper divisors (1894040).

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

1303840 is a wasteful number, since it uses less digits than its factorization.

1303840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1303840 is about 1141.8581347961. The cubic root of 1303840 is about 109.2466428947.

Adding to 1303840 its reverse (483031), we get a palindrome (1786871).

The spelling of 1303840 in words is "one million, three hundred three thousand, eight hundred forty".