281331960 has 128 divisors (see below), whose sum is σ = 1038804480. Its totient is φ = 59355648.

The previous prime is 281331931. The next prime is 281331961. The reversal of 281331960 is 69133182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281331961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1962 + ... + 23801.

It is an arithmetic number, because the mean of its divisors is an integer number (8115660).

Almost surely, 2^281331960 is an apocalyptic number.

281331960 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 281331960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519402240).

281331960 is an abundant number, since it is smaller than the sum of its proper divisors (757472520).

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

281331960 is a wasteful number, since it uses less digits than its factorization.

281331960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25797 (or 25793 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 281331960 is about 16772.9532283376. The cubic root of 281331960 is about 655.2489856199.

The spelling of 281331960 in words is "two hundred eighty-one million, three hundred thirty-one thousand, nine hundred sixty".