281728965 has 16 divisors (see below), whose sum is σ = 515161728. Its totient is φ = 128790336.

The previous prime is 281728907. The next prime is 281728969. The reversal of 281728965 is 569827182.

It is not a de Polignac number, because 281728965 - 2⁶ = 281728901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281728969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1341462 + ... + 1341671.

It is an arithmetic number, because the mean of its divisors is an integer number (32197608).

Almost surely, 2^281728965 is an apocalyptic number.

It is an amenable number.

281728965 is a deficient number, since it is larger than the sum of its proper divisors (233432763).

281728965 is a wasteful number, since it uses less digits than its factorization.

281728965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683148.

The product of its digits is 483840, while the sum is 48.

The square root of 281728965 is about 16784.7837340849. The cubic root of 281728965 is about 655.5570615955.

The spelling of 281728965 in words is "two hundred eighty-one million, seven hundred twenty-eight thousand, nine hundred sixty-five".