228065656 has 64 divisors (see below), whose sum is σ = 528192000. Its totient is φ = 89900928.

The previous prime is 228065639. The next prime is 228065689. The reversal of 228065656 is 656560822.

It is a happy number.

228065656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 380445 + ... + 381043.

It is an arithmetic number, because the mean of its divisors is an integer number (8253000).

Almost surely, 2^228065656 is an apocalyptic number.

228065656 is a gapful number since it is divisible by the number (26) 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 228065656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264096000).

228065656 is an abundant number, since it is smaller than the sum of its proper divisors (300126344).

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

228065656 is a wasteful number, since it uses less digits than its factorization.

228065656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 228065656 is about 15101.8428014597. The cubic root of 228065656 is about 610.9701091575.

The spelling of 228065656 in words is "two hundred twenty-eight million, sixty-five thousand, six hundred fifty-six".