1224210440 has 16 divisors (see below), whose sum is σ = 2754473580. Its totient is φ = 489684160.

The previous prime is 1224210401. The next prime is 1224210499. The reversal of 1224210440 is 440124221.

It can be written as a sum of positive squares in 2 ways, for example, as 1223460484 + 749956 = 34978^2 + 866^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15302591 + ... + 15302670.

Almost surely, 2^1224210440 is an apocalyptic number.

1224210440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224210440 is an abundant number, since it is smaller than the sum of its proper divisors (1530263140).

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

1224210440 is a wasteful number, since it uses less digits than its factorization.

1224210440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30605272 (or 30605268 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1224210440 is about 34988.7187533353. The cubic root of 1224210440 is about 1069.7575483511.

Adding to 1224210440 its reverse (440124221), we get a palindrome (1664334661).

The spelling of 1224210440 in words is "one billion, two hundred twenty-four million, two hundred ten thousand, four hundred forty".