1243338720 has 192 divisors, whose sum is σ = 4440199680. Its totient is φ = 289916928.

The previous prime is 1243338697. The next prime is 1243338749. The reversal of 1243338720 is 278333421.

1243338720 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113317 + ... + 123803.

It is an arithmetic number, because the mean of its divisors is an integer number (23126040).

Almost surely, 2^1243338720 is an apocalyptic number.

1243338720 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 1243338720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2220099840).

1243338720 is an abundant number, since it is smaller than the sum of its proper divisors (3196860960).

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

1243338720 is a wasteful number, since it uses less digits than its factorization.

1243338720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10537 (or 10529 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 1243338720 is about 35261.0084938023. The cubic root of 1243338720 is about 1075.3004301828.

The spelling of 1243338720 in words is "one billion, two hundred forty-three million, three hundred thirty-eight thousand, seven hundred twenty".