280505080 has 16 divisors (see below), whose sum is σ = 631136520. Its totient is φ = 112202016.

The previous prime is 280505059. The next prime is 280505089. The reversal of 280505080 is 80505082.

It is a super-4 number, since 4×280505080⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280505089) 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 3 ways as a sum of consecutive naturals, for example, 3506274 + ... + 3506353.

Almost surely, 2^280505080 is an apocalyptic number.

280505080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280505080 is an abundant number, since it is smaller than the sum of its proper divisors (350631440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280505080 is a wasteful number, since it uses less digits than its factorization.

280505080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7012638 (or 7012634 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 280505080 is about 16748.2858824418. The cubic root of 280505080 is about 654.6063948358.

The spelling of 280505080 in words is "two hundred eighty million, five hundred five thousand, eighty".