1440646 has 8 divisors (see below), whose sum is σ = 2201904. Its totient is φ = 706680.

The previous prime is 1440641. The next prime is 1440679. The reversal of 1440646 is 6460441.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1440646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6690 + ... + 6901.

It is an arithmetic number, because the mean of its divisors is an integer number (275238).

2^1440646 is an apocalyptic number.

1440646 is a deficient number, since it is larger than the sum of its proper divisors (761258).

1440646 is a wasteful number, since it uses less digits than its factorization.

1440646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13646.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1440646 is about 1200.2691364856. The cubic root of 1440646 is about 112.9412073100.

The spelling of 1440646 in words is "one million, four hundred forty thousand, six hundred forty-six".