1228513266 has 12 divisors (see below), whose sum is σ = 2661778782. Its totient is φ = 409504416.

The previous prime is 1228513261. The next prime is 1228513327. The reversal of 1228513266 is 6623158221.

It can be written as a sum of positive squares in only one way, i.e., 889769241 + 338744025 = 29829^2 + 18405^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1228513266.

It is not an unprimeable number, because it can be changed into a prime (1228513261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34125351 + ... + 34125386.

Almost surely, 2^1228513266 is an apocalyptic number.

1228513266 is an abundant number, since it is smaller than the sum of its proper divisors (1433265516).

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

1228513266 is a wasteful number, since it uses less digits than its factorization.

1228513266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68250745 (or 68250742 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1228513266 is about 35050.1535802627. The cubic root of 1228513266 is about 1071.0094023712.

The spelling of 1228513266 in words is "one billion, two hundred twenty-eight million, five hundred thirteen thousand, two hundred sixty-six".