228772656 has 120 divisors (see below), whose sum is σ = 741971360. Its totient is φ = 64447488.

The previous prime is 228772637. The next prime is 228772667. The reversal of 228772656 is 656277822.

228772656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72030 + ... + 75138.

Almost surely, 2^228772656 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 228772656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370985680).

228772656 is an abundant number, since it is smaller than the sum of its proper divisors (513198704).

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

228772656 is a wasteful number, since it uses less digits than its factorization.

228772656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203 (or 3194 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 228772656 is about 15125.2324279662. The cubic root of 228772656 is about 611.6007905289.

The spelling of 228772656 in words is "two hundred twenty-eight million, seven hundred seventy-two thousand, six hundred fifty-six".