1228367872 has 48 divisors (see below), whose sum is σ = 2516213700. Its totient is φ = 599162880.

The previous prime is 1228367869. The next prime is 1228367887. The reversal of 1228367872 is 2787638221.

It can be written as a sum of positive squares in 2 ways, for example, as 989479936 + 238887936 = 31456^2 + 15456^2 .

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 3 ways as a sum of consecutive naturals, for example, 76654 + ... + 91282.

Almost surely, 2^1228367872 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 1228367872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1258106850).

1228367872 is an abundant number, since it is smaller than the sum of its proper divisors (1287845828).

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

1228367872 is an equidigital number, since it uses as much as digits as its factorization.

1228367872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14692 (or 14672 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 1228367872 is about 35048.0794338292. The cubic root of 1228367872 is about 1070.9671495418.

The spelling of 1228367872 in words is "one billion, two hundred twenty-eight million, three hundred sixty-seven thousand, eight hundred seventy-two".