228444920 has 32 divisors (see below), whose sum is σ = 560729520. Its totient is φ = 83070720.

The previous prime is 228444899. The next prime is 228444941. The reversal of 228444920 is 29444822.

It is an interprime number because it is at equal distance from previous prime (228444899) and next prime (228444941).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259157 + ... + 260036.

Almost surely, 2^228444920 is an apocalyptic number.

228444920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228444920 is an abundant number, since it is smaller than the sum of its proper divisors (332284600).

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

228444920 is a wasteful number, since it uses less digits than its factorization.

228444920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519215 (or 519211 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 228444920 is about 15114.3944635569. The cubic root of 228444920 is about 611.3085944920.

The spelling of 228444920 in words is "two hundred twenty-eight million, four hundred forty-four thousand, nine hundred twenty".