1228786317 has 24 divisors (see below), whose sum is σ = 1988606880. Its totient is φ = 724589280.

The previous prime is 1228786253. The next prime is 1228786319. The reversal of 1228786317 is 7136878221.

1228786317 is a `hidden beast` number, since 1 + 2 + 2 + 8 + 7 + 8 + 631 + 7 = 666.

1228786317 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1228786317 - 2⁶ = 1228786253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228786319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164067 + ... + 171392.

It is an arithmetic number, because the mean of its divisors is an integer number (82858620).

Almost surely, 2^1228786317 is an apocalyptic number.

It is an amenable number.

1228786317 is a deficient number, since it is larger than the sum of its proper divisors (759820563).

1228786317 is a wasteful number, since it uses less digits than its factorization.

1228786317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335513 (or 335510 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 1228786317 is about 35054.0485108354. The cubic root of 1228786317 is about 1071.0887444869.

The spelling of 1228786317 in words is "one billion, two hundred twenty-eight million, seven hundred eighty-six thousand, three hundred seventeen".