228161235444 has 48 divisors (see below), whose sum is σ = 560573422080. Its totient is φ = 72028107360.

The previous prime is 228161235413. The next prime is 228161235469. The reversal of 228161235444 is 444532161822.

It is a junction number, because it is equal to n+sod(n) for n = 228161235396 and 228161235405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570747 + ... + 884349.

It is an arithmetic number, because the mean of its divisors is an integer number (11678612960).

Almost surely, 2^228161235444 is an apocalyptic number.

It is an amenable number.

228161235444 is an abundant number, since it is smaller than the sum of its proper divisors (332412186636).

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

228161235444 is a wasteful number, since it uses less digits than its factorization.

228161235444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316820 (or 316818 counting only the distinct ones).

The product of its digits is 368640, while the sum is 42.

The spelling of 228161235444 in words is "two hundred twenty-eight billion, one hundred sixty-one million, two hundred thirty-five thousand, four hundred forty-four".