281839104 has 120 divisors (see below), whose sum is σ = 840071232. Its totient is φ = 90869760.

The previous prime is 281839087. The next prime is 281839109. The reversal of 281839104 is 401938182.

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 (281839109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141862 + ... + 143834.

Almost surely, 2^281839104 is an apocalyptic number.

281839104 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 281839104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420035616).

281839104 is an abundant number, since it is smaller than the sum of its proper divisors (558232128).

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

281839104 is a wasteful number, since it uses less digits than its factorization.

281839104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 281839104 is about 16788.0643315422. The cubic root of 281839104 is about 655.6424781971.

The spelling of 281839104 in words is "two hundred eighty-one million, eight hundred thirty-nine thousand, one hundred four".