1423440144 has 120 divisors (see below), whose sum is σ = 4699715072. Its totient is φ = 393569280.

The previous prime is 1423440127. The next prime is 1423440181. The reversal of 1423440144 is 4410443241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8472 + ... + 54024.

Almost surely, 2^1423440144 is an apocalyptic number.

1423440144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1423440144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2349857536).

1423440144 is an abundant number, since it is smaller than the sum of its proper divisors (3276274928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1423440144 is a wasteful number, since it uses less digits than its factorization.

1423440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45605 (or 45596 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 1423440144 is about 37728.5057218014. The cubic root of 1423440144 is about 1124.8978064208.

Adding to 1423440144 its reverse (4410443241), we get a palindrome (5833883385).

The spelling of 1423440144 in words is "one billion, four hundred twenty-three million, four hundred forty thousand, one hundred forty-four".