280500055 has 32 divisors (see below), whose sum is σ = 376358400. Its totient is φ = 198979200.

The previous prime is 280500053. The next prime is 280500061. The reversal of 280500055 is 550005082.

It is not a de Polignac number, because 280500055 - 2¹ = 280500053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280500053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425316 + ... + 425974.

It is an arithmetic number, because the mean of its divisors is an integer number (11761200).

Almost surely, 2^280500055 is an apocalyptic number.

280500055 is a deficient number, since it is larger than the sum of its proper divisors (95858345).

280500055 is a wasteful number, since it uses less digits than its factorization.

280500055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 280500055 is about 16748.1358664181. The cubic root of 280500055 is about 654.6024859146.

The spelling of 280500055 in words is "two hundred eighty million, five hundred thousand, fifty-five".