281940206 has 8 divisors (see below), whose sum is σ = 447787440. Its totient is φ = 132677728.

The previous prime is 281940203. The next prime is 281940227. The reversal of 281940206 is 602049182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281940203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4146146 + ... + 4146213.

It is an arithmetic number, because the mean of its divisors is an integer number (55973430).

Almost surely, 2^281940206 is an apocalyptic number.

281940206 is a deficient number, since it is larger than the sum of its proper divisors (165847234).

281940206 is a wasteful number, since it uses less digits than its factorization.

281940206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8292378.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 281940206 is about 16791.0751889210. The cubic root of 281940206 is about 655.7208667059.

Adding to 281940206 its reverse (602049182), we get a palindrome (883989388).

The spelling of 281940206 in words is "two hundred eighty-one million, nine hundred forty thousand, two hundred six".