1224320332240 has 40 divisors (see below), whose sum is σ = 2852249364000. Its totient is φ = 488746697856.

The previous prime is 1224320332177. The next prime is 1224320332247. The reversal of 1224320332240 is 422330234221.

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 = 1224320332199 and 1224320332208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224320332247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15294754 + ... + 15374593.

It is an arithmetic number, because the mean of its divisors is an integer number (71306234100).

Almost surely, 2^{1224320332240} is an apocalyptic number.

1224320332240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224320332240 is an abundant number, since it is smaller than the sum of its proper divisors (1627929031760).

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

1224320332240 is a wasteful number, since it uses less digits than its factorization.

1224320332240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30669859 (or 30669853 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 1224320332240 its reverse (422330234221), we get a palindrome (1646650566461).

The spelling of 1224320332240 in words is "one trillion, two hundred twenty-four billion, three hundred twenty million, three hundred thirty-two thousand, two hundred forty".