281930 has 24 divisors (see below), whose sum is σ = 560196. Its totient is φ = 102080.

The previous prime is 281927. The next prime is 281933. The reversal of 281930 is 39182.

It is an interprime number because it is at equal distance from previous prime (281927) and next prime (281933).

It can be written as a sum of positive squares in 2 ways, for example, as 267289 + 14641 = 517^2 + 121^2 .

It is a junction number, because it is equal to n+sod(n) for n = 281896 and 281905.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281930.

It is not an unprimeable number, because it can be changed into a prime (281933) 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, 1094 + ... + 1326.

2²⁸¹⁹³⁰ is an apocalyptic number.

281930 is a deficient number, since it is larger than the sum of its proper divisors (278266).

281930 is a wasteful number, since it uses less digits than its factorization.

281930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 281930 is about 530.9708089905. The cubic root of 281930 is about 65.5712954428.

The spelling of 281930 in words is "two hundred eighty-one thousand, nine hundred thirty".