1243340000 has 240 divisors, whose sum is σ = 3570956928. Its totient is φ = 417216000.

The previous prime is 1243339961. The next prime is 1243340009. The reversal of 1243340000 is 433421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243340009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11619947 + ... + 11620053.

Almost surely, 2^1243340000 is an apocalyptic number.

1243340000 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 1243340000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785478464).

1243340000 is an abundant number, since it is smaller than the sum of its proper divisors (2327616928).

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

1243340000 is an equidigital number, since it uses as much as digits as its factorization.

1243340000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1243340000 is about 35261.0266441577. The cubic root of 1243340000 is about 1075.3007991849.

Adding to 1243340000 its reverse (433421), we get a palindrome (1243773421).

The spelling of 1243340000 in words is "one billion, two hundred forty-three million, three hundred forty thousand".