1224003640 has 16 divisors (see below), whose sum is σ = 2754008280. Its totient is φ = 489601440.

The previous prime is 1224003569. The next prime is 1224003647. The reversal of 1224003640 is 463004221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224003647) 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, 15300006 + ... + 15300085.

Almost surely, 2^1224003640 is an apocalyptic number.

1224003640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224003640 is an abundant number, since it is smaller than the sum of its proper divisors (1530004640).

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

1224003640 is a wasteful number, since it uses less digits than its factorization.

1224003640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30600102 (or 30600098 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1224003640 is about 34985.7633902706. The cubic root of 1224003640 is about 1069.6973086211.

Adding to 1224003640 its reverse (463004221), we get a palindrome (1687007861).

The spelling of 1224003640 in words is "one billion, two hundred twenty-four million, three thousand, six hundred forty".