1228233856 has 64 divisors (see below), whose sum is σ = 2586067200. Its totient is φ = 579870720.

The previous prime is 1228233829. The next prime is 1228233887. The reversal of 1228233856 is 6583328221.

It is a tau number, because it is divible by the number of its divisors (64).

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, 229936 + ... + 235216.

It is an arithmetic number, because the mean of its divisors is an integer number (40407300).

Almost surely, 2^1228233856 is an apocalyptic number.

1228233856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228233856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293033600).

1228233856 is an abundant number, since it is smaller than the sum of its proper divisors (1357833344).

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

1228233856 is an equidigital number, since it uses as much as digits as its factorization.

1228233856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397 (or 5385 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 1228233856 is about 35046.1674937503. The cubic root of 1228233856 is about 1070.9282003104.

The spelling of 1228233856 in words is "one billion, two hundred twenty-eight million, two hundred thirty-three thousand, eight hundred fifty-six".