281000001028 has 24 divisors (see below), whose sum is σ = 498679645464. Its totient is φ = 138531648000.

The previous prime is 281000001013. The next prime is 281000001047. The reversal of 281000001028 is 820100000182.

It can be written as a sum of positive squares in 4 ways, for example, as 90142856644 + 190857144384 = 300238^2 + 436872^2 .

It is a super-2 number, since 2×281000001028² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1345675 + ... + 1540402.

It is an arithmetic number, because the mean of its divisors is an integer number (20778318561).

Almost surely, 2^281000001028 is an apocalyptic number.

It is an amenable number.

281000001028 is a deficient number, since it is larger than the sum of its proper divisors (217679644436).

281000001028 is a wasteful number, since it uses less digits than its factorization.

281000001028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886423 (or 2886421 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 281000001028 in words is "two hundred eighty-one billion, one thousand, twenty-eight".