1228720008 has 32 divisors (see below), whose sum is σ = 3075903360. Its totient is φ = 409026240.

The previous prime is 1228720001. The next prime is 1228720019. The reversal of 1228720008 is 8000278221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1228720001) 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, 15648 + ... + 51983.

It is an arithmetic number, because the mean of its divisors is an integer number (96121980).

Almost surely, 2^1228720008 is an apocalyptic number.

It is an amenable number.

1228720008 is an abundant number, since it is smaller than the sum of its proper divisors (1847183352).

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

1228720008 is a wasteful number, since it uses less digits than its factorization.

1228720008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68397 (or 68393 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 1228720008 is about 35053.1026872087. The cubic root of 1228720008 is about 1071.0694777519.

Adding to 1228720008 its reverse (8000278221), we get a palindrome (9228998229).

The spelling of 1228720008 in words is "one billion, two hundred twenty-eight million, seven hundred twenty thousand, eight".