228517256 has 64 divisors (see below), whose sum is σ = 497448000. Its totient is φ = 97320960.

The previous prime is 228517241. The next prime is 228517271. The reversal of 228517256 is 652715822.

It is an interprime number because it is at equal distance from previous prime (228517241) and next prime (228517271).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161480 + ... + 162888.

It is an arithmetic number, because the mean of its divisors is an integer number (7772625).

Almost surely, 2^228517256 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 228517256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248724000).

228517256 is an abundant number, since it is smaller than the sum of its proper divisors (268930744).

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

228517256 is a wasteful number, since it uses less digits than its factorization.

228517256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542 (or 1538 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 228517256 is about 15116.7872248041. The cubic root of 228517256 is about 611.3731103382.

The spelling of 228517256 in words is "two hundred twenty-eight million, five hundred seventeen thousand, two hundred fifty-six".