1224788639 has 8 divisors (see below), whose sum is σ = 1280087760. Its totient is φ = 1170360576.

The previous prime is 1224788629. The next prime is 1224788687. The reversal of 1224788639 is 9368874221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224788639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224788629) by changing a digit.

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, 214889 + ... + 220514.

It is an arithmetic number, because the mean of its divisors is an integer number (160010970).

Almost surely, 2^1224788639 is an apocalyptic number.

1224788639 is a deficient number, since it is larger than the sum of its proper divisors (55299121).

1224788639 is an equidigital number, since it uses as much as digits as its factorization.

1224788639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435529.

The product of its digits is 1161216, while the sum is 50.

The square root of 1224788639 is about 34996.9804268883. The cubic root of 1224788639 is about 1069.9259386244.

The spelling of 1224788639 in words is "one billion, two hundred twenty-four million, seven hundred eighty-eight thousand, six hundred thirty-nine".