228381456209988 has 12 divisors (see below), whose sum is σ = 532890064490000. Its totient is φ = 76127152069992.

The previous prime is 228381456209957. The next prime is 228381456209993. The reversal of 228381456209988 is 889902654183822.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9515894008738 + ... + 9515894008761.

Almost surely, 2^{228381456209988} is an apocalyptic number.

It is an amenable number.

228381456209988 is an abundant number, since it is smaller than the sum of its proper divisors (304508608280012).

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

228381456209988 is a wasteful number, since it uses less digits than its factorization.

228381456209988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19031788017506 (or 19031788017504 counting only the distinct ones).

The product of its (nonzero) digits is 955514880, while the sum is 75.

The spelling of 228381456209988 in words is "two hundred twenty-eight trillion, three hundred eighty-one billion, four hundred fifty-six million, two hundred nine thousand, nine hundred eighty-eight".