1228781089 has 8 divisors (see below), whose sum is σ = 1255760000. Its totient is φ = 1202087952.

The previous prime is 1228781087. The next prime is 1228781101. The reversal of 1228781089 is 9801878221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1228781089 - 2¹ = 1228781087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228781083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62739 + ... + 79960.

It is an arithmetic number, because the mean of its divisors is an integer number (156970000).

Almost surely, 2^1228781089 is an apocalyptic number.

It is an amenable number.

1228781089 is a deficient number, since it is larger than the sum of its proper divisors (26978911).

1228781089 is a wasteful number, since it uses less digits than its factorization.

1228781089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142887.

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 1228781089 is about 35053.9739401969. The cubic root of 1228781089 is about 1071.0872254650.

The spelling of 1228781089 in words is "one billion, two hundred twenty-eight million, seven hundred eighty-one thousand, eighty-nine".