1143246720 has 768 divisors, whose sum is σ = 4948876800. Its totient is φ = 218972160.

The previous prime is 1143246707. The next prime is 1143246721. The reversal of 1143246720 is 276423411.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143246721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30898542 + ... + 30898578.

It is an arithmetic number, because the mean of its divisors is an integer number (6443850).

Almost surely, 2^1143246720 is an apocalyptic number.

1143246720 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 1143246720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2474438400).

1143246720 is an abundant number, since it is smaller than the sum of its proper divisors (3805630080).

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

1143246720 is a wasteful number, since it uses less digits than its factorization.

1143246720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 1143246720 is about 33811.9316218402. The cubic root of 1143246720 is about 1045.6347021419.

The spelling of 1143246720 in words is "one billion, one hundred forty-three million, two hundred forty-six thousand, seven hundred twenty".