228621056 has 18 divisors (see below), whose sum is σ = 456349572. Its totient is φ = 114310400.

The previous prime is 228621037. The next prime is 228621059. The reversal of 228621056 is 650126822.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (228621059) by changing a digit.

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 as a sum of consecutive naturals, namely, 446270 + ... + 446781.

It is an arithmetic number, because the mean of its divisors is an integer number (25352754).

Almost surely, 2^228621056 is an apocalyptic number.

It is an amenable number.

228621056 is a deficient number, since it is larger than the sum of its proper divisors (227728516).

228621056 is an frugal number, since it uses more digits than its factorization.

228621056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893067 (or 893053 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 228621056 is about 15120.2201042181. The cubic root of 228621056 is about 611.4656648696.

Adding to 228621056 its reverse (650126822), we get a palindrome (878747878).

The spelling of 228621056 in words is "two hundred twenty-eight million, six hundred twenty-one thousand, fifty-six".