1228147264 has 56 divisors (see below), whose sum is σ = 2478098168. Its totient is φ = 603832320.

The previous prime is 1228147259. The next prime is 1228147273. The reversal of 1228147264 is 4627418221.

It can be written as a sum of positive squares in 4 ways, for example, as 151782400 + 1076364864 = 12320^2 + 32808^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1123102 + ... + 1124194.

It is an arithmetic number, because the mean of its divisors is an integer number (44251753).

Almost surely, 2^1228147264 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 1228147264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1239049084).

1228147264 is an abundant number, since it is smaller than the sum of its proper divisors (1249950904).

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

1228147264 is a wasteful number, since it uses less digits than its factorization.

1228147264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383 (or 1373 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 1228147264 is about 35044.9320729831. The cubic root of 1228147264 is about 1070.9030324664.

The spelling of 1228147264 in words is "one billion, two hundred twenty-eight million, one hundred forty-seven thousand, two hundred sixty-four".