281112930 has 160 divisors (see below), whose sum is σ = 884721024. Its totient is φ = 62705664.

The previous prime is 281112913. The next prime is 281112943. The reversal of 281112930 is 39211182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 281112894 and 281112903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 243234 + ... + 244386.

Almost surely, 2^281112930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281112930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442360512).

281112930 is an abundant number, since it is smaller than the sum of its proper divisors (603608094).

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

281112930 is a wasteful number, since it uses less digits than its factorization.

281112930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1213 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 281112930 is about 16766.4226953754. The cubic root of 281112930 is about 655.0788942127.

The spelling of 281112930 in words is "two hundred eighty-one million, one hundred twelve thousand, nine hundred thirty".