1143420544 has 128 divisors (see below), whose sum is σ = 2776619520. Its totient is φ = 457850880.

The previous prime is 1143420529. The next prime is 1143420547. The reversal of 1143420544 is 4450243411.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1143420547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4127734 + ... + 4128010.

It is an arithmetic number, because the mean of its divisors is an integer number (21692340).

Almost surely, 2^1143420544 is an apocalyptic number.

1143420544 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 1143420544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388309760).

1143420544 is an abundant number, since it is smaller than the sum of its proper divisors (1633198976).

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

1143420544 is a wasteful number, since it uses less digits than its factorization.

1143420544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1143420544 is about 33814.5019777018. The cubic root of 1143420544 is about 1045.6876936769.

Adding to 1143420544 its reverse (4450243411), we get a palindrome (5593663955).

The spelling of 1143420544 in words is "one billion, one hundred forty-three million, four hundred twenty thousand, five hundred forty-four".