281284480 has 128 divisors (see below), whose sum is σ = 712514880. Its totient is φ = 105971712.

The previous prime is 281284469. The next prime is 281284501. The reversal of 281284480 is 84482182.

It is a tau number, because it is divible by the number of its divisors (128).

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, 1427742 + ... + 1427938.

Almost surely, 2^281284480 is an apocalyptic number.

281284480 is a gapful number since it is divisible by the number (20) 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 281284480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356257440).

281284480 is an abundant number, since it is smaller than the sum of its proper divisors (431230400).

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

281284480 is a wasteful number, since it uses less digits than its factorization.

281284480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 37.

The square root of 281284480 is about 16771.5377947283. The cubic root of 281284480 is about 655.2121217288.

The spelling of 281284480 in words is "two hundred eighty-one million, two hundred eighty-four thousand, four hundred eighty".