281996860 has 48 divisors (see below), whose sum is σ = 625595040. Its totient is φ = 106479360.

The previous prime is 281996831. The next prime is 281996861. The reversal of 281996860 is 68699182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281996861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119290 + ... + 121630.

It is an arithmetic number, because the mean of its divisors is an integer number (13033230).

Almost surely, 2^281996860 is an apocalyptic number.

281996860 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 281996860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312797520).

281996860 is an abundant number, since it is smaller than the sum of its proper divisors (343598180).

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

281996860 is a wasteful number, since it uses less digits than its factorization.

281996860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686 (or 2684 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 281996860 is about 16792.7621313469. The cubic root of 281996860 is about 655.7647846729.

The spelling of 281996860 in words is "two hundred eighty-one million, nine hundred ninety-six thousand, eight hundred sixty".