280478755 has 16 divisors (see below), whose sum is σ = 342144000. Its totient is φ = 220685920.

The previous prime is 280478719. The next prime is 280478777. The reversal of 280478755 is 557874082.

It is not a de Polignac number, because 280478755 - 2⁹ = 280478243 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 211986 + ... + 213304.

It is an arithmetic number, because the mean of its divisors is an integer number (21384000).

Almost surely, 2^280478755 is an apocalyptic number.

280478755 is a deficient number, since it is larger than the sum of its proper divisors (61665245).

280478755 is a wasteful number, since it uses less digits than its factorization.

280478755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994.

The product of its (nonzero) digits is 627200, while the sum is 46.

The square root of 280478755 is about 16747.4999626810. The cubic root of 280478755 is about 654.5859162376.

The spelling of 280478755 in words is "two hundred eighty million, four hundred seventy-eight thousand, seven hundred fifty-five".