1143543400 has 48 divisors (see below), whose sum is σ = 2666040300. Its totient is φ = 456161280.

The previous prime is 1143543397. The next prime is 1143543439. The reversal of 1143543400 is 43453411.

It can be written as a sum of positive squares in 6 ways, for example, as 196504324 + 947039076 = 14018^2 + 30774^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 66936 + ... + 82264.

Almost surely, 2^1143543400 is an apocalyptic number.

1143543400 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 1143543400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1333020150).

1143543400 is an abundant number, since it is smaller than the sum of its proper divisors (1522496900).

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

1143543400 is a wasteful number, since it uses less digits than its factorization.

1143543400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15718 (or 15709 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1143543400 is about 33816.3185459328. The cubic root of 1143543400 is about 1045.7251440000.

Adding to 1143543400 its reverse (43453411), we get a palindrome (1186996811).

The spelling of 1143543400 in words is "one billion, one hundred forty-three million, five hundred forty-three thousand, four hundred".