281981602 has 8 divisors (see below), whose sum is σ = 483397056. Its totient is φ = 120849252.

The previous prime is 281981599. The next prime is 281981617. The reversal of 281981602 is 206189182.

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

It is an unprimeable number.

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, 10070758 + ... + 10070785.

It is an arithmetic number, because the mean of its divisors is an integer number (60424632).

Almost surely, 2^281981602 is an apocalyptic number.

281981602 is a deficient number, since it is larger than the sum of its proper divisors (201415454).

281981602 is a wasteful number, since it uses less digits than its factorization.

281981602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20141552.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 281981602 is about 16792.3078223334. The cubic root of 281981602 is about 655.7529573077.

The spelling of 281981602 in words is "two hundred eighty-one million, nine hundred eighty-one thousand, six hundred two".