281225824 has 24 divisors (see below), whose sum is σ = 603997128. Its totient is φ = 127829760.

The previous prime is 281225797. The next prime is 281225839. The reversal of 281225824 is 428522182.

It is a self number, because there is not a number n which added to its sum of digits gives 281225824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399117 + ... + 399820.

It is an arithmetic number, because the mean of its divisors is an integer number (25166547).

Almost surely, 2^281225824 is an apocalyptic number.

It is an amenable number.

281225824 is an abundant number, since it is smaller than the sum of its proper divisors (322771304).

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

281225824 is a wasteful number, since it uses less digits than its factorization.

281225824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798958 (or 798950 counting only the distinct ones).

The product of its digits is 20480, while the sum is 34.

The square root of 281225824 is about 16769.7890266992. The cubic root of 281225824 is about 655.1665749642.

The spelling of 281225824 in words is "two hundred eighty-one million, two hundred twenty-five thousand, eight hundred twenty-four".