281104128 has 144 divisors (see below), whose sum is σ = 845071360. Its totient is φ = 92150784.

The previous prime is 281104121. The next prime is 281104139. The reversal of 281104128 is 821401182.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281104121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 462801 + ... + 463407.

Almost surely, 2^281104128 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 281104128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422535680).

281104128 is an abundant number, since it is smaller than the sum of its proper divisors (563967232).

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

281104128 is an equidigital number, since it uses as much as digits as its factorization.

281104128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699 (or 679 counting only the distinct ones).

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

The square root of 281104128 is about 16766.1602044117. The cubic root of 281104128 is about 655.0720570261.

The spelling of 281104128 in words is "two hundred eighty-one million, one hundred four thousand, one hundred twenty-eight".