228917908 has 12 divisors (see below), whose sum is σ = 401560852. Its totient is φ = 114186240.

The previous prime is 228917891. The next prime is 228917911. The reversal of 228917908 is 809719822.

It can be written as a sum of positive squares in 2 ways, for example, as 70862724 + 158055184 = 8418^2 + 12572^2 .

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 66285 + ... + 69652.

Almost surely, 2^228917908 is an apocalyptic number.

It is an amenable number.

228917908 is a deficient number, since it is larger than the sum of its proper divisors (172642944).

228917908 is a wasteful number, since it uses less digits than its factorization.

228917908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136362 (or 136360 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 228917908 is about 15130.0333112654. The cubic root of 228917908 is about 611.7302020372.

The spelling of 228917908 in words is "two hundred twenty-eight million, nine hundred seventeen thousand, nine hundred eight".