1243323040 has 24 divisors (see below), whose sum is σ = 2937351060. Its totient is φ = 497329152.

The previous prime is 1243323023. The next prime is 1243323041. The reversal of 1243323040 is 403233421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1220244624 + 23078416 = 34932^2 + 4804^2 .

It is not an unprimeable number, because it can be changed into a prime (1243323041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3885225 + ... + 3885544.

Almost surely, 2^1243323040 is an apocalyptic number.

1243323040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243323040 is an abundant number, since it is smaller than the sum of its proper divisors (1694028020).

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

1243323040 is an equidigital number, since it uses as much as digits as its factorization.

1243323040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7770784 (or 7770776 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 1243323040 is about 35260.7861511907. The cubic root of 1243323040 is about 1075.2959098856.

Adding to 1243323040 its reverse (403233421), we get a palindrome (1646556461).

The spelling of 1243323040 in words is "one billion, two hundred forty-three million, three hundred twenty-three thousand, forty".