228685378880 has 448 divisors, whose sum is σ = 675485568000. Its totient is φ = 72015347712.

The previous prime is 228685378861. The next prime is 228685378897. The reversal of 228685378880 is 88873586822.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 401907236 + ... + 401907804.

Almost surely, 2^228685378880 is an apocalyptic number.

228685378880 is a gapful number since it is divisible by the number (20) 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 228685378880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337742784000).

228685378880 is an abundant number, since it is smaller than the sum of its proper divisors (446800189120).

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

228685378880 is a wasteful number, since it uses less digits than its factorization.

228685378880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 82575360, while the sum is 65.

The spelling of 228685378880 in words is "two hundred twenty-eight billion, six hundred eighty-five million, three hundred seventy-eight thousand, eight hundred eighty".