1440420443 has 16 divisors (see below), whose sum is σ = 1808782080. Its totient is φ = 1114322400.

The previous prime is 1440420433. The next prime is 1440420469. The reversal of 1440420443 is 3440240441.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1440420443 - 2¹⁰ = 1440419419 is a prime.

It is a super-2 number, since 2×1440420443² = 4149622105224632498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1440420403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56588 + ... + 77993.

It is an arithmetic number, because the mean of its divisors is an integer number (113048880).

Almost surely, 2^1440420443 is an apocalyptic number.

1440420443 is a deficient number, since it is larger than the sum of its proper divisors (368361637).

1440420443 is a wasteful number, since it uses less digits than its factorization.

1440420443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134738.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 1440420443 is about 37952.8713406509. The cubic root of 1440420443 is about 1129.3531272991.

Adding to 1440420443 its reverse (3440240441), we get a palindrome (4880660884).

The spelling of 1440420443 in words is "one billion, four hundred forty million, four hundred twenty thousand, four hundred forty-three".