1228491768 has 64 divisors (see below), whose sum is σ = 3591624960. Its totient is φ = 342832896.

The previous prime is 1228491767. The next prime is 1228491793. The reversal of 1228491768 is 8671948221.

It is a happy number.

1228491768 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228491767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77805 + ... + 92252.

It is an arithmetic number, because the mean of its divisors is an integer number (56119140).

Almost surely, 2^1228491768 is an apocalyptic number.

It is an amenable number.

1228491768 is an abundant number, since it is smaller than the sum of its proper divisors (2363133192).

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

1228491768 is a wasteful number, since it uses less digits than its factorization.

1228491768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170116 (or 170112 counting only the distinct ones).

The product of its digits is 387072, while the sum is 48.

The square root of 1228491768 is about 35049.8469040879. The cubic root of 1228491768 is about 1071.0031550654.

The spelling of 1228491768 in words is "one billion, two hundred twenty-eight million, four hundred ninety-one thousand, seven hundred sixty-eight".