1228868905 has 16 divisors (see below), whose sum is σ = 1612929024. Its totient is φ = 891374080.

The previous prime is 1228868897. The next prime is 1228868969. The reversal of 1228868905 is 5098688221.

It is not a de Polignac number, because 1228868905 - 2³ = 1228868897 is a prime.

It is a Duffinian number.

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, 8104 + ... + 50233.

It is an arithmetic number, because the mean of its divisors is an integer number (100808064).

Almost surely, 2^1228868905 is an apocalyptic number.

It is an amenable number.

1228868905 is a deficient number, since it is larger than the sum of its proper divisors (384060119).

1228868905 is a wasteful number, since it uses less digits than its factorization.

1228868905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58736.

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 1228868905 is about 35055.2265004806. The cubic root of 1228868905 is about 1071.1127402770.

The spelling of 1228868905 in words is "one billion, two hundred twenty-eight million, eight hundred sixty-eight thousand, nine hundred five".