1143944256 has 224 divisors, whose sum is σ = 3754453248. Its totient is φ = 299335680.

The previous prime is 1143944251. The next prime is 1143944273. The reversal of 1143944256 is 6524493411.

1143944256 is nontrivially palindromic in base 15.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1143944251) 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 31 ways as a sum of consecutive naturals, for example, 4070836 + ... + 4071116.

It is an arithmetic number, because the mean of its divisors is an integer number (16760952).

Almost surely, 2^1143944256 is an apocalyptic number.

1143944256 is a gapful number since it is divisible by the number (16) 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 1143944256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1877226624).

1143944256 is an abundant number, since it is smaller than the sum of its proper divisors (2610508992).

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

1143944256 is a wasteful number, since it uses less digits than its factorization.

1143944256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 539 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 1143944256 is about 33822.2449875818. The cubic root of 1143944256 is about 1045.8473187035.

The spelling of 1143944256 in words is "one billion, one hundred forty-three million, nine hundred forty-four thousand, two hundred fifty-six".