1228763312 has 20 divisors (see below), whose sum is σ = 2720833296. Its totient is φ = 526612800.

The previous prime is 1228763309. The next prime is 1228763351. The reversal of 1228763312 is 2133678221.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5485439 + ... + 5485662.

Almost surely, 2^1228763312 is an apocalyptic number.

It is an amenable number.

1228763312 is an abundant number, since it is smaller than the sum of its proper divisors (1492069984).

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

1228763312 is a wasteful number, since it uses less digits than its factorization.

1228763312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10971116 (or 10971110 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 1228763312 is about 35053.7203731644. The cubic root of 1228763312 is about 1071.0820602354.

The spelling of 1228763312 in words is "one billion, two hundred twenty-eight million, seven hundred sixty-three thousand, three hundred twelve".