1228810338 has 120 divisors (see below), whose sum is σ = 3220181712. Its totient is φ = 349208496.

The previous prime is 1228810309. The next prime is 1228810379. The reversal of 1228810338 is 8330188221.

It is an unprimeable number.

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 59 ways as a sum of consecutive naturals, for example, 2246181 + ... + 2246727.

Almost surely, 2^1228810338 is an apocalyptic number.

1228810338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228810338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1610090856).

1228810338 is an abundant number, since it is smaller than the sum of its proper divisors (1991371374).

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

1228810338 is a wasteful number, since it uses less digits than its factorization.

1228810338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1228810338 is about 35054.3911372028. The cubic root of 1228810338 is about 1071.0957238547.

Adding to 1228810338 its reverse (8330188221), we get a palindrome (9558998559).

The spelling of 1228810338 in words is "one billion, two hundred twenty-eight million, eight hundred ten thousand, three hundred thirty-eight".