1440369 has 16 divisors (see below), whose sum is σ = 2439040. Its totient is φ = 822960.

The previous prime is 1440349. The next prime is 1440379. The reversal of 1440369 is 9630441.

It is not a de Polignac number, because 1440369 - 2¹³ = 1432177 is a prime.

It is a super-2 number, since 2×1440369² = 4149325712322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1440349) 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 15 ways as a sum of consecutive naturals, for example, 3622 + ... + 3999.

It is an arithmetic number, because the mean of its divisors is an integer number (152440).

2^1440369 is an apocalyptic number.

It is an amenable number.

1440369 is a deficient number, since it is larger than the sum of its proper divisors (998671).

1440369 is an equidigital number, since it uses as much as digits as its factorization.

1440369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7637 (or 7631 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1440369 is about 1200.1537401517. The cubic root of 1440369 is about 112.9339682612.

The spelling of 1440369 in words is "one million, four hundred forty thousand, three hundred sixty-nine".