228791808 has 240 divisors, whose sum is σ = 777512736. Its totient is φ = 63406080.

The previous prime is 228791807. The next prime is 228791851. The reversal of 228791808 is 808197822.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228791807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1322410 + ... + 1322582.

Almost surely, 2^228791808 is an apocalyptic number.

228791808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228791808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388756368).

228791808 is an abundant number, since it is smaller than the sum of its proper divisors (548720928).

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

228791808 is a wasteful number, since it uses less digits than its factorization.

228791808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 228791808 is about 15125.8655289540. The cubic root of 228791808 is about 611.6178570375.

The spelling of 228791808 in words is "two hundred twenty-eight million, seven hundred ninety-one thousand, eight hundred eight".