1330440 has 32 divisors (see below), whose sum is σ = 3991680. Its totient is φ = 354752.

The previous prime is 1330423. The next prime is 1330453. The reversal of 1330440 is 440331.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5424 + ... + 5663.

It is an arithmetic number, because the mean of its divisors is an integer number (124740).

2^1330440 is an apocalyptic number.

1330440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1330440 is an abundant number, since it is smaller than the sum of its proper divisors (2661240).

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

1330440 is a wasteful number, since it uses less digits than its factorization.

1330440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11101 (or 11097 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1330440 is about 1153.4470078855. The cubic root of 1330440 is about 109.9845708387.

Adding to 1330440 its reverse (440331), we get a palindrome (1770771).

It can be divided in two parts, 1330 and 440, that added together give a triangular number (1770 = T₅₉).

The spelling of 1330440 in words is "one million, three hundred thirty thousand, four hundred forty".