1228119786 has 64 divisors (see below), whose sum is σ = 2776118400. Its totient is φ = 402392448.

The previous prime is 1228119749. The next prime is 1228119787. The reversal of 1228119786 is 6879118221.

It is not an unprimeable number, because it can be changed into a prime (1228119787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 805621 + ... + 807143.

It is an arithmetic number, because the mean of its divisors is an integer number (43376850).

Almost surely, 2^1228119786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228119786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388059200).

1228119786 is an abundant number, since it is smaller than the sum of its proper divisors (1547998614).

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

1228119786 is a wasteful number, since it uses less digits than its factorization.

1228119786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780 (or 1774 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 1228119786 is about 35044.5400312231. The cubic root of 1228119786 is about 1070.8950457768.

The spelling of 1228119786 in words is "one billion, two hundred twenty-eight million, one hundred nineteen thousand, seven hundred eighty-six".