228556988 has 24 divisors (see below), whose sum is σ = 444573360. Its totient is φ = 101928320.

The previous prime is 228556987. The next prime is 228557081. The reversal of 228556988 is 889655822.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228556981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46673 + ... + 51336.

It is an arithmetic number, because the mean of its divisors is an integer number (18523890).

Almost surely, 2^228556988 is an apocalyptic number.

It is an amenable number.

228556988 is a deficient number, since it is larger than the sum of its proper divisors (216016372).

228556988 is a wasteful number, since it uses less digits than its factorization.

228556988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98077 (or 98075 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 53.

The square root of 228556988 is about 15118.1013358159. The cubic root of 228556988 is about 611.4085411691.

The spelling of 228556988 in words is "two hundred twenty-eight million, five hundred fifty-six thousand, nine hundred eighty-eight".