280228205 has 32 divisors (see below), whose sum is σ = 365333760. Its totient is φ = 205793280.

The previous prime is 280228139. The next prime is 280228213. The reversal of 280228205 is 502822082.

It is a de Polignac number, because none of the positive numbers 2^k-280228205 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301181 + ... + 302109.

It is an arithmetic number, because the mean of its divisors is an integer number (11416680).

Almost surely, 2^280228205 is an apocalyptic number.

It is an amenable number.

280228205 is a deficient number, since it is larger than the sum of its proper divisors (85105555).

280228205 is a wasteful number, since it uses less digits than its factorization.

280228205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 280228205 is about 16740.0180704801. The cubic root of 280228205 is about 654.3909456050.

The spelling of 280228205 in words is "two hundred eighty million, two hundred twenty-eight thousand, two hundred five".