1143423301440 has 448 divisors, whose sum is σ = 4394234787840. Its totient is φ = 246074941440.

The previous prime is 1143423301399. The next prime is 1143423301469. The reversal of 1143423301440 is 441033243411.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1143423301398 and 1143423301407.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 20784370 + ... + 20839310.

Almost surely, 2^{1143423301440} is an apocalyptic number.

1143423301440 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 1143423301440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2197117393920).

1143423301440 is an abundant number, since it is smaller than the sum of its proper divisors (3250811486400).

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

1143423301440 is a wasteful number, since it uses less digits than its factorization.

1143423301440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55150 (or 55140 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 1143423301440 its reverse (441033243411), we get a palindrome (1584456544851).

The spelling of 1143423301440 in words is "one trillion, one hundred forty-three billion, four hundred twenty-three million, three hundred one thousand, four hundred forty".