1440242423 has 4 divisors (see below), whose sum is σ = 1486701888. Its totient is φ = 1393782960.

The previous prime is 1440242407. The next prime is 1440242429. The reversal of 1440242423 is 3242420441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3242420441 = 13 ⋅249416957.

It is a cyclic number.

It is not a de Polignac number, because 1440242423 - 2⁴ = 1440242407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1440242392 and 1440242401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440242429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23229686 + ... + 23229747.

It is an arithmetic number, because the mean of its divisors is an integer number (371675472).

Almost surely, 2^1440242423 is an apocalyptic number.

1440242423 is a deficient number, since it is larger than the sum of its proper divisors (46459465).

1440242423 is an equidigital number, since it uses as much as digits as its factorization.

1440242423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46459464.

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

The square root of 1440242423 is about 37950.5259910848. The cubic root of 1440242423 is about 1129.3066002063.

Adding to 1440242423 its reverse (3242420441), we get a palindrome (4682662864).

The spelling of 1440242423 in words is "one billion, four hundred forty million, two hundred forty-two thousand, four hundred twenty-three".