12228887272 has 48 divisors (see below), whose sum is σ = 27592474500. Its totient is φ = 5060224512.

The previous prime is 12228887267. The next prime is 12228887299. The reversal of 12228887272 is 27278882221.

It can be written as a sum of positive squares in 2 ways, for example, as 11897137476 + 331749796 = 109074^2 + 18214^2 .

It is a super-2 number, since 2×12228887272² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 526497 + ... + 549232.

Almost surely, 2^12228887272 is an apocalyptic number.

It is an amenable number.

12228887272 is an abundant number, since it is smaller than the sum of its proper divisors (15363587228).

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

12228887272 is a wasteful number, since it uses less digits than its factorization.

12228887272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075778 (or 1075767 counting only the distinct ones).

The product of its digits is 802816, while the sum is 49.

The spelling of 12228887272 in words is "twelve billion, two hundred twenty-eight million, eight hundred eighty-seven thousand, two hundred seventy-two".