281878272 has 144 divisors (see below), whose sum is σ = 897970080. Its totient is φ = 86704128.

The previous prime is 281878249. The next prime is 281878277. The reversal of 281878272 is 272878182.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281878277) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 88288 + ... + 91424.

Almost surely, 2^281878272 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 281878272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448985040).

281878272 is an abundant number, since it is smaller than the sum of its proper divisors (616091808).

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

281878272 is a wasteful number, since it uses less digits than its factorization.

281878272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175 (or 3155 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 281878272 is about 16789.2308340793. The cubic root of 281878272 is about 655.6728489710.

The spelling of 281878272 in words is "two hundred eighty-one million, eight hundred seventy-eight thousand, two hundred seventy-two".