281628068 has 12 divisors (see below), whose sum is σ = 500205552. Its totient is φ = 138712200.

The previous prime is 281628043. The next prime is 281628071. The reversal of 281628068 is 860826182.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525158 + ... + 525693.

It is an arithmetic number, because the mean of its divisors is an integer number (41683796).

Almost surely, 2^281628068 is an apocalyptic number.

It is an amenable number.

281628068 is a deficient number, since it is larger than the sum of its proper divisors (218577484).

281628068 is a wasteful number, since it uses less digits than its factorization.

281628068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050922 (or 1050920 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 281628068 is about 16781.7778557577. Note that the first 3 decimals coincide. The cubic root of 281628068 is about 655.4787929440.

The spelling of 281628068 in words is "two hundred eighty-one million, six hundred twenty-eight thousand, sixty-eight".