228968657 has 6 divisors (see below), whose sum is σ = 239357202. Its totient is φ = 219012992.

The previous prime is 228968653. The next prime is 228968669. The reversal of 228968657 is 756869822.

228968657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 185395456 + 43573201 = 13616^2 + 6601^2 .

It is not a de Polignac number, because 228968657 - 2² = 228968653 is a prime.

It is a super-3 number, since 3×228968657³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228968599 and 228968608.

It is not an unprimeable number, because it can be changed into a prime (228968651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215888 + ... + 216945.

It is an arithmetic number, because the mean of its divisors is an integer number (39892867).

Almost surely, 2^228968657 is an apocalyptic number.

It is an amenable number.

228968657 is a deficient number, since it is larger than the sum of its proper divisors (10388545).

228968657 is an equidigital number, since it uses as much as digits as its factorization.

228968657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432879 (or 432856 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 228968657 is about 15131.7103131140. The cubic root of 228968657 is about 611.7754036883.

The spelling of 228968657 in words is "two hundred twenty-eight million, nine hundred sixty-eight thousand, six hundred fifty-seven".