280480831 has 8 divisors (see below), whose sum is σ = 303223280. Its totient is φ = 258536448.

The previous prime is 280480829. The next prime is 280480859. The reversal of 280480831 is 138084082.

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

It is a cyclic number.

It is not a de Polignac number, because 280480831 - 2¹ = 280480829 is a prime.

It is a super-2 number, since 2×280480831² = 157338993116901122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280480801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198786 + ... + 200191.

It is an arithmetic number, because the mean of its divisors is an integer number (37902910).

Almost surely, 2^280480831 is an apocalyptic number.

280480831 is a deficient number, since it is larger than the sum of its proper divisors (22742449).

280480831 is a wasteful number, since it uses less digits than its factorization.

280480831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399033.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 280480831 is about 16747.5619419664. The cubic root of 280480831 is about 654.5875312346.

The spelling of 280480831 in words is "two hundred eighty million, four hundred eighty thousand, eight hundred thirty-one".