1228118920 has 64 divisors (see below), whose sum is σ = 3235075200. Its totient is φ = 410795520.

The previous prime is 1228118873. The next prime is 1228118987. The reversal of 1228118920 is 298118221.

1228118920 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42010 + ... + 64969.

It is an arithmetic number, because the mean of its divisors is an integer number (50548050).

Almost surely, 2^1228118920 is an apocalyptic number.

1228118920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228118920 is an abundant number, since it is smaller than the sum of its proper divisors (2006956280).

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

1228118920 is a wasteful number, since it uses less digits than its factorization.

1228118920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107038 (or 107034 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 1228118920 is about 35044.5276755159. The cubic root of 1228118920 is about 1070.8947940654.

The spelling of 1228118920 in words is "one billion, two hundred twenty-eight million, one hundred eighteen thousand, nine hundred twenty".