1443142440 has 128 divisors (see below), whose sum is σ = 4821120000. Its totient is φ = 383986944.

The previous prime is 1443142433. The next prime is 1443142447. The reversal of 1443142440 is 442413441.

It is an interprime number because it is at equal distance from previous prime (1443142433) and next prime (1443142447).

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

It is not an unprimeable number, because it can be changed into a prime (1443142447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 600361 + ... + 602759.

It is an arithmetic number, because the mean of its divisors is an integer number (37665000).

Almost surely, 2^1443142440 is an apocalyptic number.

1443142440 is a gapful number since it is divisible by the number (10) 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 1443142440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2410560000).

1443142440 is an abundant number, since it is smaller than the sum of its proper divisors (3377977560).

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

1443142440 is a wasteful number, since it uses less digits than its factorization.

1443142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976 (or 2966 counting only the distinct ones).

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

The square root of 1443142440 is about 37988.7146400086. The cubic root of 1443142440 is about 1130.0640682081.

Adding to 1443142440 its reverse (442413441), we get a palindrome (1885555881).

The spelling of 1443142440 in words is "one billion, four hundred forty-three million, one hundred forty-two thousand, four hundred forty".