281228112 has 100 divisors (see below), whose sum is σ = 887996736. Its totient is φ = 85216320.

The previous prime is 281228053. The next prime is 281228131. The reversal of 281228112 is 211822182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4393 + ... + 24119.

Almost surely, 2^281228112 is an apocalyptic number.

281228112 is a gapful number since it is divisible by the number (22) 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 281228112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443998368).

281228112 is an abundant number, since it is smaller than the sum of its proper divisors (606768624).

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

281228112 is a wasteful number, since it uses less digits than its factorization.

281228112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19758 (or 19743 counting only the distinct ones).

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

The square root of 281228112 is about 16769.8572444729. The cubic root of 281228112 is about 655.1683517298.

The spelling of 281228112 in words is "two hundred eighty-one million, two hundred twenty-eight thousand, one hundred twelve".