281440860 has 48 divisors (see below), whose sum is σ = 788955552. Its totient is φ = 74963200.

The previous prime is 281440849. The next prime is 281440871. The reversal of 281440860 is 68044182.

281440860 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (281440849) and next prime (281440871).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61450 + ... + 65870.

It is an arithmetic number, because the mean of its divisors is an integer number (16436574).

Almost surely, 2^281440860 is an apocalyptic number.

281440860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281440860 is an abundant number, since it is smaller than the sum of its proper divisors (507514692).

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

281440860 is a wasteful number, since it uses less digits than its factorization.

281440860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494 (or 5492 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 281440860 is about 16776.1992119789. The cubic root of 281440860 is about 655.3335208778. Note that the first 3 decimals are identical.

The spelling of 281440860 in words is "two hundred eighty-one million, four hundred forty thousand, eight hundred sixty".