1143459840 has 208 divisors, whose sum is σ = 3764976768. Its totient is φ = 296091648.

The previous prime is 1143459829. The next prime is 1143459841. The reversal of 1143459840 is 489543411.

1143459840 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143459841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2273029 + ... + 2273531.

Almost surely, 2^1143459840 is an apocalyptic number.

1143459840 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 1143459840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1882488384).

1143459840 is an abundant number, since it is smaller than the sum of its proper divisors (2621516928).

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

1143459840 is an equidigital number, since it uses as much as digits as its factorization.

1143459840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1143459840 is about 33815.0830251827. The cubic root of 1143459840 is about 1045.6996726095.

The spelling of 1143459840 in words is "one billion, one hundred forty-three million, four hundred fifty-nine thousand, eight hundred forty".