281840112 has 60 divisors (see below), whose sum is σ = 798297864. Its totient is φ = 92810880.

The previous prime is 281840087. The next prime is 281840113. The reversal of 281840112 is 211048182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281840113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162 + ... + 23742.

Almost surely, 2^281840112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281840112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399148932).

281840112 is an abundant number, since it is smaller than the sum of its proper divisors (516457752).

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

281840112 is a wasteful number, since it uses less digits than its factorization.

281840112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23678 (or 23669 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 281840112 is about 16788.0943528442. The cubic root of 281840112 is about 655.6432598332.

Adding to 281840112 its reverse (211048182), we get a palindrome (492888294).

The spelling of 281840112 in words is "two hundred eighty-one million, eight hundred forty thousand, one hundred twelve".