1243344020 has 12 divisors (see below), whose sum is σ = 2611022484. Its totient is φ = 497337600.

The previous prime is 1243343987. The next prime is 1243344031. The reversal of 1243344020 is 204433421.

It can be written as a sum of positive squares in 2 ways, for example, as 156850576 + 1086493444 = 12524^2 + 32962^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31083581 + ... + 31083620.

It is an arithmetic number, because the mean of its divisors is an integer number (217585207).

Almost surely, 2^1243344020 is an apocalyptic number.

1243344020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243344020 is an abundant number, since it is smaller than the sum of its proper divisors (1367678464).

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

1243344020 is a wasteful number, since it uses less digits than its factorization.

1243344020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62167210 (or 62167208 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1243344020 is about 35261.0836475568. The cubic root of 1243344020 is about 1075.3019580808.

Adding to 1243344020 its reverse (204433421), we get a palindrome (1447777441).

The spelling of 1243344020 in words is "one billion, two hundred forty-three million, three hundred forty-four thousand, twenty".