1143242320 has 80 divisors (see below), whose sum is σ = 2928062592. Its totient is φ = 411655680.

The previous prime is 1143242311. The next prime is 1143242329. The reversal of 1143242320 is 232423411.

It is an interprime number because it is at equal distance from previous prime (1143242311) and next prime (1143242329).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1143242291 and 1143242300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143242329) 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, 84334 + ... + 96946.

Almost surely, 2^1143242320 is an apocalyptic number.

1143242320 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 1143242320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464031296).

1143242320 is an abundant number, since it is smaller than the sum of its proper divisors (1784820272).

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

1143242320 is a wasteful number, since it uses less digits than its factorization.

1143242320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12740 (or 12734 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1143242320 is about 33811.8665559889. The cubic root of 1143242320 is about 1045.6333606996.

Adding to 1143242320 its reverse (232423411), we get a palindrome (1375665731).

The spelling of 1143242320 in words is "one billion, one hundred forty-three million, two hundred forty-two thousand, three hundred twenty".