1228763284 has 12 divisors (see below), whose sum is σ = 2457526624. Its totient is φ = 526612824.

The previous prime is 1228763251. The next prime is 1228763309. The reversal of 1228763284 is 4823678221.

1228763284 is an admirable number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1228763284.

It is a congruent number.

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, 21942174 + ... + 21942229.

Almost surely, 2^1228763284 is an apocalyptic number.

1228763284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1228763284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1228763284 is a wasteful number, since it uses less digits than its factorization.

1228763284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43884414 (or 43884412 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 1228763284 is about 35053.7199737774. The cubic root of 1228763284 is about 1071.0820520998.

The spelling of 1228763284 in words is "one billion, two hundred twenty-eight million, seven hundred sixty-three thousand, two hundred eighty-four".