1220442104 has 64 divisors (see below), whose sum is σ = 2774476800. Its totient is φ = 491318784.

The previous prime is 1220442089. The next prime is 1220442161. The reversal of 1220442104 is 4012440221.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 683597 + ... + 685379.

It is an arithmetic number, because the mean of its divisors is an integer number (43351200).

Almost surely, 2^1220442104 is an apocalyptic number.

1220442104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220442104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387238400).

1220442104 is an abundant number, since it is smaller than the sum of its proper divisors (1554034696).

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

1220442104 is a wasteful number, since it uses less digits than its factorization.

1220442104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532 (or 2528 counting only the distinct ones).

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

The square root of 1220442104 is about 34934.8265202505. The cubic root of 1220442104 is about 1068.6587859457.

Adding to 1220442104 its reverse (4012440221), we get a palindrome (5232882325).

The spelling of 1220442104 in words is "one billion, two hundred twenty million, four hundred forty-two thousand, one hundred four".