228709656 has 168 divisors, whose sum is σ = 749423220. Its totient is φ = 65345616.

The previous prime is 228709651. The next prime is 228709667. The reversal of 228709656 is 656907822.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228709651) by changing a digit.

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 41 ways as a sum of consecutive naturals, for example, 32672805 + ... + 32672811.

Almost surely, 2^228709656 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 228709656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374711610).

228709656 is an abundant number, since it is smaller than the sum of its proper divisors (520713564).

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

228709656 is an frugal number, since it uses more digits than its factorization.

228709656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 12 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 228709656 is about 15123.1496719433. The cubic root of 228709656 is about 611.5446439773.

The spelling of 228709656 in words is "two hundred twenty-eight million, seven hundred nine thousand, six hundred fifty-six".