228523656 has 32 divisors (see below), whose sum is σ = 604916640. Its totient is φ = 71693568.

The previous prime is 228523649. The next prime is 228523657. The reversal of 228523656 is 656325822.

It is a super-2 number, since 2×228523656² = 104446122703212672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228523657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279646 + ... + 280461.

It is an arithmetic number, because the mean of its divisors is an integer number (18903645).

Almost surely, 2^228523656 is an apocalyptic number.

It is an amenable number.

228523656 is an abundant number, since it is smaller than the sum of its proper divisors (376392984).

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

228523656 is a wasteful number, since it uses less digits than its factorization.

228523656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560133 (or 560129 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 228523656 is about 15116.9989085136. The cubic root of 228523656 is about 611.3788177867.

The spelling of 228523656 in words is "two hundred twenty-eight million, five hundred twenty-three thousand, six hundred fifty-six".