280828005 has 8 divisors (see below), whose sum is σ = 449324832. Its totient is φ = 149774928.

The previous prime is 280828003. The next prime is 280828043. The reversal of 280828005 is 500828082.

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

It is not a de Polignac number, because 280828005 - 2¹ = 280828003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280828001) 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 7 ways as a sum of consecutive naturals, for example, 9360919 + ... + 9360948.

It is an arithmetic number, because the mean of its divisors is an integer number (56165604).

Almost surely, 2^280828005 is an apocalyptic number.

It is an amenable number.

280828005 is a deficient number, since it is larger than the sum of its proper divisors (168496827).

280828005 is a wasteful number, since it uses less digits than its factorization.

280828005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18721875.

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 280828005 is about 16757.9236482328. The cubic root of 280828005 is about 654.8574986697.

The spelling of 280828005 in words is "two hundred eighty million, eight hundred twenty-eight thousand, five".