1224320240 has 80 divisors (see below), whose sum is σ = 3344223456. Its totient is φ = 410956800.

The previous prime is 1224320219. The next prime is 1224320257. The reversal of 1224320240 is 420234221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42071 + ... + 64950.

Almost surely, 2^1224320240 is an apocalyptic number.

1224320240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224320240 is an abundant number, since it is smaller than the sum of its proper divisors (2119903216).

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

1224320240 is a wasteful number, since it uses less digits than its factorization.

1224320240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107058 (or 107052 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1224320240 is about 34990.2877953297. The cubic root of 1224320240 is about 1069.7895297446.

Adding to 1224320240 its reverse (420234221), we get a palindrome (1644554461).

The spelling of 1224320240 in words is "one billion, two hundred twenty-four million, three hundred twenty thousand, two hundred forty".