228673287388 has 96 divisors (see below), whose sum is σ = 509764953600. Its totient is φ = 87301138176.

The previous prime is 228673287379. The next prime is 228673287391. The reversal of 228673287388 is 883782376822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28064331 + ... + 28072477.

It is an arithmetic number, because the mean of its divisors is an integer number (5310051600).

Almost surely, 2^228673287388 is an apocalyptic number.

228673287388 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 228673287388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254882476800).

228673287388 is an abundant number, since it is smaller than the sum of its proper divisors (281091666212).

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

228673287388 is a wasteful number, since it uses less digits than its factorization.

228673287388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10859 (or 10857 counting only the distinct ones).

The product of its digits is 86704128, while the sum is 64.

The spelling of 228673287388 in words is "two hundred twenty-eight billion, six hundred seventy-three million, two hundred eighty-seven thousand, three hundred eighty-eight".