281040984 has 96 divisors (see below), whose sum is σ = 878660640. Its totient is φ = 79488000.

The previous prime is 281040983. The next prime is 281040997. The reversal of 281040984 is 489040182.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281040983) 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, 48144 + ... + 53664.

It is an arithmetic number, because the mean of its divisors is an integer number (9152715).

Almost surely, 2^281040984 is an apocalyptic number.

281040984 is a gapful number since it is divisible by the number (24) 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 281040984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439330320).

281040984 is an abundant number, since it is smaller than the sum of its proper divisors (597619656).

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

281040984 is a wasteful number, since it uses less digits than its factorization.

281040984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641 (or 5634 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 281040984 is about 16764.2770199016. The cubic root of 281040984 is about 655.0230040675.

The spelling of 281040984 in words is "two hundred eighty-one million, forty thousand, nine hundred eighty-four".