1228422272 has 128 divisors (see below), whose sum is σ = 3184358400. Its totient is φ = 457712640.

The previous prime is 1228422269. The next prime is 1228422289. The reversal of 1228422272 is 2722248221.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (32).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223979 + ... + 229397.

It is an arithmetic number, because the mean of its divisors is an integer number (24877800).

Almost surely, 2^1228422272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228422272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1592179200).

1228422272 is an abundant number, since it is smaller than the sum of its proper divisors (1955936128).

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

1228422272 is a wasteful number, since it uses less digits than its factorization.

1228422272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474 (or 5462 counting only the distinct ones).

The product of its digits is 14336, while the sum is 32.

The square root of 1228422272 is about 35048.8555019989. The cubic root of 1228422272 is about 1070.9829590709.

The spelling of 1228422272 in words is "one billion, two hundred twenty-eight million, four hundred twenty-two thousand, two hundred seventy-two".