1430440 has 32 divisors (see below), whose sum is σ = 3512160. Its totient is φ = 520000.

The previous prime is 1430419. The next prime is 1430441. The reversal of 1430440 is 440341.

It is not an unprimeable number, because it can be changed into a prime (1430441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186 + ... + 2065.

It is an arithmetic number, because the mean of its divisors is an integer number (109755).

2^1430440 is an apocalyptic number.

1430440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1430440 is an abundant number, since it is smaller than the sum of its proper divisors (2081720).

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

1430440 is a wasteful number, since it uses less digits than its factorization.

1430440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273 (or 3269 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1430440 is about 1196.0100334027. The cubic root of 1430440 is about 112.6738710580.

Adding to 1430440 its reverse (440341), we get a palindrome (1870781).

Subtracting from 1430440 its reverse (440341), we obtain a palindrome (990099).

The spelling of 1430440 in words is "one million, four hundred thirty thousand, four hundred forty".