281841000 has 128 divisors (see below), whose sum is σ = 1005039360. Its totient is φ = 64416000.

The previous prime is 281840981. The next prime is 281841013. The reversal of 281841000 is 148182.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14290 + ... + 27710.

It is an arithmetic number, because the mean of its divisors is an integer number (7851870).

Almost surely, 2^281841000 is an apocalyptic number.

281841000 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 281841000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (502519680).

281841000 is an abundant number, since it is smaller than the sum of its proper divisors (723198360).

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

281841000 is a wasteful number, since it uses less digits than its factorization.

281841000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13452 (or 13438 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 281841000 is about 16788.1208001372. The cubic root of 281841000 is about 655.6439484158.

Adding to 281841000 its reverse (148182), we get a palindrome (281989182).

The spelling of 281841000 in words is "two hundred eighty-one million, eight hundred forty-one thousand".