228171905808 has 320 divisors, whose sum is σ = 761471262720. Its totient is φ = 57128601600.

The previous prime is 228171905803. The next prime is 228171905851. The reversal of 228171905808 is 808509171822.

It is not an unprimeable number, because it can be changed into a prime (228171905803) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 85424313 + ... + 85426983.

It is an arithmetic number, because the mean of its divisors is an integer number (2379597696).

Almost surely, 2^228171905808 is an apocalyptic number.

228171905808 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 228171905808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380735631360).

228171905808 is an abundant number, since it is smaller than the sum of its proper divisors (533299356912).

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

228171905808 is a wasteful number, since it uses less digits than its factorization.

228171905808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3526 (or 3520 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 51.

The spelling of 228171905808 in words is "two hundred twenty-eight billion, one hundred seventy-one million, nine hundred five thousand, eight hundred eight".