1440669 has 8 divisors (see below), whose sum is σ = 1972960. Its totient is φ = 934416.

The previous prime is 1440641. The next prime is 1440679. The reversal of 1440669 is 9660441.

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

It is not a de Polignac number, because 1440669 - 2¹⁶ = 1375133 is a prime.

It is a super-2 number, since 2×1440669² = 4151054335122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6379 + ... + 6600.

It is an arithmetic number, because the mean of its divisors is an integer number (246620).

2^1440669 is an apocalyptic number.

It is an amenable number.

1440669 is a deficient number, since it is larger than the sum of its proper divisors (532291).

1440669 is a wasteful number, since it uses less digits than its factorization.

1440669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13019.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1440669 is about 1200.2787176319. The cubic root of 1440669 is about 112.9418083445.

The spelling of 1440669 in words is "one million, four hundred forty thousand, six hundred sixty-nine".