1440730 has 8 divisors (see below), whose sum is σ = 2593332. Its totient is φ = 576288.

The previous prime is 1440727. The next prime is 1440731. The reversal of 1440730 is 370441.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1432809 + 7921 = 1197^2 + 89^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1440698 and 1440707.

It is not an unprimeable number, because it can be changed into a prime (1440731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72027 + ... + 72046.

2^1440730 is an apocalyptic number.

1440730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1440730 is a deficient number, since it is larger than the sum of its proper divisors (1152602).

1440730 is a wasteful number, since it uses less digits than its factorization.

1440730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144080.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 1440730 is about 1200.3041281275. The cubic root of 1440730 is about 112.9434023616.

The spelling of 1440730 in words is "one million, four hundred forty thousand, seven hundred thirty".