1430840 has 16 divisors (see below), whose sum is σ = 3219480. Its totient is φ = 572320.

The previous prime is 1430813. The next prime is 1430851. The reversal of 1430840 is 480341.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17846 + ... + 17925.

2^1430840 is an apocalyptic number.

1430840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1430840 is an abundant number, since it is smaller than the sum of its proper divisors (1788640).

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

1430840 is a wasteful number, since it uses less digits than its factorization.

1430840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35782 (or 35778 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1430840 is about 1196.1772443915. The cubic root of 1430840 is about 112.6843725699.

The spelling of 1430840 in words is "one million, four hundred thirty thousand, eight hundred forty".