281130730 has 16 divisors (see below), whose sum is σ = 510766560. Its totient is φ = 111400912.

The previous prime is 281130719. The next prime is 281130737. The reversal of 281130730 is 37031182.

It is a junction number, because it is equal to n+sod(n) for n = 281130695 and 281130704.

It is not an unprimeable number, because it can be changed into a prime (281130737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130300 + ... + 132439.

It is an arithmetic number, because the mean of its divisors is an integer number (31922910).

Almost surely, 2^281130730 is an apocalyptic number.

281130730 is a deficient number, since it is larger than the sum of its proper divisors (229635830).

281130730 is a wasteful number, since it uses less digits than its factorization.

281130730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262853.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 281130730 is about 16766.9535098061. The cubic root of 281130730 is about 655.0927203978.

The spelling of 281130730 in words is "two hundred eighty-one million, one hundred thirty thousand, seven hundred thirty".