1224311240 has 32 divisors (see below), whose sum is σ = 2758407480. Its totient is φ = 489065472.

The previous prime is 1224311201. The next prime is 1224311261. The reversal of 1224311240 is 421134221.

It can be written as a sum of positive squares in 4 ways, for example, as 831399556 + 392911684 = 28834^2 + 19822^2 .

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

It is an unprimeable number.

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, 10064 + ... + 50496.

Almost surely, 2^1224311240 is an apocalyptic number.

1224311240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224311240 is an abundant number, since it is smaller than the sum of its proper divisors (1534096240).

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

1224311240 is a wasteful number, since it uses less digits than its factorization.

1224311240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41201 (or 41197 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1224311240 is about 34990.1591879774. The cubic root of 1224311240 is about 1069.7869083908.

Adding to 1224311240 its reverse (421134221), we get a palindrome (1645445461).

The spelling of 1224311240 in words is "one billion, two hundred twenty-four million, three hundred eleven thousand, two hundred forty".