1224340220 has 12 divisors (see below), whose sum is σ = 2571114504. Its totient is φ = 489736080.

The previous prime is 1224340219. The next prime is 1224340223. The reversal of 1224340220 is 220434221.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 61217011 = 1224340220 / (1 + 2 + 2 + 4 + 3 + 4 + 0 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1224340192 and 1224340201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224340223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30608486 + ... + 30608525.

It is an arithmetic number, because the mean of its divisors is an integer number (214259542).

Almost surely, 2^1224340220 is an apocalyptic number.

1224340220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224340220 is an abundant number, since it is smaller than the sum of its proper divisors (1346774284).

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

1224340220 is a wasteful number, since it uses less digits than its factorization.

1224340220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61217020 (or 61217018 counting only the distinct ones).

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

The square root of 1224340220 is about 34990.5733019623. The cubic root of 1224340220 is about 1069.7953491040.

Adding to 1224340220 its reverse (220434221), we get a palindrome (1444774441).

The spelling of 1224340220 in words is "one billion, two hundred twenty-four million, three hundred forty thousand, two hundred twenty".