1224345040 has 40 divisors (see below), whose sum is σ = 2848645800. Its totient is φ = 489386496.

The previous prime is 1224345029. The next prime is 1224345041. The reversal of 1224345040 is 405434221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 59351616 + 1164993424 = 7704^2 + 34132^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1224344996 and 1224345014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224345041) 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 7 ways as a sum of consecutive naturals, for example, 126286 + ... + 135634.

It is an arithmetic number, because the mean of its divisors is an integer number (71216145).

Almost surely, 2^1224345040 is an apocalyptic number.

1224345040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224345040 is an abundant number, since it is smaller than the sum of its proper divisors (1624300760).

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

1224345040 is a wasteful number, since it uses less digits than its factorization.

1224345040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999 (or 10993 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1224345040 is about 34990.6421775880. The cubic root of 1224345040 is about 1069.7967529640.

Adding to 1224345040 its reverse (405434221), we get a palindrome (1629779261).

The spelling of 1224345040 in words is "one billion, two hundred twenty-four million, three hundred forty-five thousand, forty".