280055828 has 24 divisors (see below), whose sum is σ = 531965952. Its totient is φ = 128235744.

The previous prime is 280055821. The next prime is 280055833. The reversal of 280055828 is 828550082.

It is a junction number, because it is equal to n+sod(n) for n = 280055791 and 280055800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280055821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14600 + ... + 27807.

It is an arithmetic number, because the mean of its divisors is an integer number (22165248).

Almost surely, 2^280055828 is an apocalyptic number.

It is an amenable number.

280055828 is a deficient number, since it is larger than the sum of its proper divisors (251910124).

280055828 is a wasteful number, since it uses less digits than its factorization.

280055828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42551 (or 42549 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 280055828 is about 16734.8686281070. The cubic root of 280055828 is about 654.2567394078.

It can be divided in two parts, 28005 and 5828, that added together give a palindrome (33833).

The spelling of 280055828 in words is "two hundred eighty million, fifty-five thousand, eight hundred twenty-eight".