1243233320 has 64 divisors (see below), whose sum is σ = 3205509120. Its totient is φ = 425101824.

The previous prime is 1243233317. The next prime is 1243233323. The reversal of 1243233320 is 233323421.

It is an interprime number because it is at equal distance from previous prime (1243233317) and next prime (1243233323).

It is not an unprimeable number, because it can be changed into a prime (1243233323) 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, 101444 + ... + 113036.

It is an arithmetic number, because the mean of its divisors is an integer number (50086080).

Almost surely, 2^1243233320 is an apocalyptic number.

1243233320 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 1243233320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1602754560).

1243233320 is an abundant number, since it is smaller than the sum of its proper divisors (1962275800).

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

1243233320 is a wasteful number, since it uses less digits than its factorization.

1243233320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11994 (or 11990 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 1243233320 is about 35259.5138934161. The cubic root of 1243233320 is about 1075.2700442908.

Adding to 1243233320 its reverse (233323421), we get a palindrome (1476556741).

The spelling of 1243233320 in words is "one billion, two hundred forty-three million, two hundred thirty-three thousand, three hundred twenty".