281994030 has 72 divisors (see below), whose sum is σ = 766577448. Its totient is φ = 71916768.

The previous prime is 281994019. The next prime is 281994049. The reversal of 281994030 is 30499182.

281994030 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44649 + ... + 50571.

It is an arithmetic number, because the mean of its divisors is an integer number (10646909).

Almost surely, 2^281994030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281994030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383288724).

281994030 is an abundant number, since it is smaller than the sum of its proper divisors (484583418).

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

281994030 is a wasteful number, since it uses less digits than its factorization.

281994030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5982 (or 5956 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 281994030 is about 16792.6778686426. The cubic root of 281994030 is about 655.7625910071.

The spelling of 281994030 in words is "two hundred eighty-one million, nine hundred ninety-four thousand, thirty".