281885916 has 72 divisors (see below), whose sum is σ = 736933680. Its totient is φ = 83725824.

The previous prime is 281885911. The next prime is 281885917. The reversal of 281885916 is 619588182.

281885916 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281885911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56416 + ... + 61208.

It is an arithmetic number, because the mean of its divisors is an integer number (10235190).

Almost surely, 2^281885916 is an apocalyptic number.

281885916 is a gapful number since it is divisible by the number (26) 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 281885916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368466840).

281885916 is an abundant number, since it is smaller than the sum of its proper divisors (455047764).

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

281885916 is a wasteful number, since it uses less digits than its factorization.

281885916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855 (or 4840 counting only the distinct ones).

The product of its digits is 276480, while the sum is 48.

The square root of 281885916 is about 16789.4584784620. The cubic root of 281885916 is about 655.6787757822.

The spelling of 281885916 in words is "two hundred eighty-one million, eight hundred eighty-five thousand, nine hundred sixteen".