1228105056 has 96 divisors (see below), whose sum is σ = 3397863168. Its totient is φ = 387622400.

The previous prime is 1228105051. The next prime is 1228105057. The reversal of 1228105056 is 6505018221.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228105051) 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 15 ways as a sum of consecutive naturals, for example, 220255 + ... + 225761.

It is an arithmetic number, because the mean of its divisors is an integer number (35394408).

Almost surely, 2^1228105056 is an apocalyptic number.

1228105056 is a gapful number since it is divisible by the number (16) 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 1228105056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1698931584).

1228105056 is an abundant number, since it is smaller than the sum of its proper divisors (2169758112).

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

1228105056 is a wasteful number, since it uses less digits than its factorization.

1228105056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644 (or 5636 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 1228105056 is about 35044.3298694668. The cubic root of 1228105056 is about 1070.8907643413.

The spelling of 1228105056 in words is "one billion, two hundred twenty-eight million, one hundred five thousand, fifty-six".